The owner of any gadget sooner or later has a desire to increase its memory. Fortunately, most often this is possible thanks to memory cards. Tablets, smartphones, e-readers, video cameras, cameras are not a complete list of devices, most models of which have a slot for a memory card.

A memory card may be needed not only to increase the memory capacity of the device - in some cases, copying a file to a memory card is the fastest and easiest way to exchange information with other devices.

The algorithm for choosing a memory card for specific equipment is clear and seemingly quite simple:

1. Decide on the form factor of the memory cards.

2. Determine the minimum speed required for the gadget to operate.

3. Select the memory capacity of the card based on your needs and financial capabilities.

Unfortunately, in reality everything may not be so simple, because the speed of the card can be described by as many as four different parameters. Therefore, before you start choosing a memory card, you should figure out what each parameter is responsible for.

Characteristics of memory cards

Form factor(card standard that describes its size, number, location and purpose of pins) is primarily determined by the gadget in which the card is supposed to be installed. There is usually a marking next to the memory card slot indicating which cards the slot is intended for. And of course, a complete list of supported memory cards will be given in the gadget’s instruction manual.

There are many form factors of memory cards, but the most common today are:

MicroSD/microSDHC/microSDXC;

JetDrive Lite;

Compact Flash:

microSD/microSDHC/microSDXC And SD/SDHC/SDXC belong to one type of card – Secure Digital. They are presented in three formats (SD, SDHC, SDXC) and three form factors (SD, miniSD, microSD), although miniSD is practically not found today. SD cards of the same format and different form factors differ only in size, they have the same filling - many cards of the microSD form factor even come with an adapter that allows them to be used as SD form factor cards.

The formats differ in the possible maximum volume:

SD can have a capacity of up to 2 GB;

SDHC – up to 32 GB;

SDXC – up to 2 TB (currently the maximum capacity among cards produced is 1 TB; on sale there are capacities of up to 512 GB).

The formats are compatible from top to bottom, i.e., a device that supports SDHC cards will also support SD, but SDXC cards will not work on this device.

JetDrive Lite can also be classified as SD format. The JetDrive Lite card is an SD card with slightly different dimensions - it is shorter than the original one. The size of the card has been changed so that when installed in MacBook Air and MacBook Pro, it does not protrude beyond the dimensions of the laptop.

The card reader depth varies between MacBook models, so JetDrive Lite cards also come in different sizes:

Memory Stick is a memory card used in Sony devices; now the most common type is Memory Stick PRO Duo ( MS Pro Duo). The characteristics are similar to the SDHC format, but have a much higher price. Fortunately, in most cases, instead of an MS Pro Duo card, you can use microSD cards with an appropriate adapter.

Compact Flash- an old-timer among modern memory cards, produced since 1994. Despite such a respectable age, CompactFlash cards are still popular in video and photographic equipment due to their high write/read speed and large capacity: the latest edition of the standard limits the speed to 167 MB/s, and volume – a completely unrealistic 128 Petabytes. In addition, the data exchange standard for cards (ATA) does not change, and in cameras fifteen years ago you can use modern cards (if the capacity is supported), as well as vice versa - insert ancient CF cards into modern cameras (if they are “fast enough”).

XQD– the memory card format developed by SanDisk, Sony and Nikon is intended for devices that are particularly demanding in terms of write/read speed. Today it is considered the most promising format for modern high-resolution video and photo cameras.

Speed ​​class memory card determines its speed performance. Most often, you can find out the minimum recording speed from the class - this indicator is very important for cards on which real-time video is recorded. Speed ​​class mismatch can result in frame loss and recording errors. There are several speed class designation standards.

SD (microSD) cards have four speed levels Class2, Class4, Class6 And Class10. The class is indicated by a number inside the letter “C” and corresponds to the minimum write speed (in MB/s) - a Class6 card will have a minimum write speed of 6 MB/s.

SDHC and SDXC cards can support the UHS (Ultra High Speed) protocol. UHS speed class denoted inside the letter “U” and corresponds to the minimum write speed in tens of MB/s. A card with a UHS U3 speed class will have a minimum write speed of 30 MB/s. There are also speed specifications for Video Speed ​​Class - (the minimum speed in MB/s is indicated after the letter "V") and Application Performance Class, indicated by the letter "A" and has a minimum write speed of 10 MB/s.

The latest modification of SDHC / SDXC cards with support for the UHS-II protocol has an additional row of contacts on the body and read/write speeds of up to 300 MB/s. But such cards have not yet become widespread.

Cards MS PRO DUO provide a minimum write speed of 4 MB/s.

Cards JetDrive Lite provide a minimum write speed of 60 MB/s.

Cards XQD provide a minimum write speed of 125 MB/s.

When choosing a memory class, you should focus on the requirements of the device for which you are purchasing the memory card. If, for example, the device does not support the UHS protocol, there is no point in buying a card with the U3 class - it will not work faster than C10. If the card is intended to be used in various devices, when choosing a speed class, you can refer to the following table:

Since read speed is usually much faster than write speed, manufacturers sometimes indicate the read speed class as multiplier(similar to CD-ROM speeds), with 1x = 150 KB/s. That is, a card with a speed of 133x will have a read speed of 133*150/1024 ≈ 20 MB/s, and a 1067x card will have a read speed of 156 MB/s.

Often manufacturers also indicate maximum values write speed And reading– they can be many times greater than the corresponding values ​​obtained by the speed class of the card. But it should be understood that such speeds are achieved under ideal conditions; in reality, the speed will always be lower, sometimes by several times. Therefore, when choosing a card, you should be guided by the minimum recording speed, and take other speeds as additional information.

Card volume determines how much information will fit on it. On the one hand, the more memory, the better. On the other hand, larger capacity cards are more expensive. In addition, the maximum capacity of memory cards on many devices is limited to a value less than the maximum capacity of a card of a given format. A device, for example, may support SDXC cards, but have a maximum memory card capacity of 128 GB. There is no point in buying a 256 GB SDXC card for such a device. Such subtleties should be clarified before purchasing in the device’s instruction manual.

Memory card options

If you need to increase the memory of your smartphone by 2-8 GB, first of all you should make sure that it has this option. If there is a memory card slot, most likely it is designed for microSD cards. An inexpensive microSD card of speed class 2-4 is suitable for a smartphone.

Most e-readers support cards up to 32GB. A card of this size and speed class 4 will allow you to assemble an impressive library at an affordable price. You just need to decide on the form factor: SD or microSD.

Progress does not stand still; some modern smartphones can record video in FullHD quality. To prevent video quality from deteriorating during recording, it is better to choose a card with a higher class: 6-10.

For action cameras recording in FullHD format, the best option would be a speed class 10 (or U1) card with a capacity of 16-32 GB.

If you are going to use the card as a hard drive for a tablet or laptop, choose from high-speed SD or microSD cards with a capacity of 128 GB or more.

To increase the memory capacity of a MacBook Air or MacBook Pro (up to the 4th generation), you can use a special development for Apple laptops - JetDrive Lite cards. Check the specific type of card in accordance with your laptop model using the table given in the guide.

If you're a professional photographer who often shoots bursts in RAW format, you'll need a high-speed card. CompactFlash or XQD - depends on your camera model.

How to understand the class of a card, what UHS is and how to choose the best card at the lowest price.

We will tell you everything using examples of Toshiba SD cards. All data is relevant for CF and other types of cards.

The card always indicates the card type, data transfer speed, card class and bus.

Types of cards

There are three types of SD cards:

• SD— the very first memory cards, compatible with all devices. Capacity up to 2 GB.
• SDHC - SD High Capacity— cards with increased capacity. Capacity 4 - 32 GB.
• SDXC - SD Extended Capacity— extended capacity cards. Capacity 32 GB - 4 TB.

Speed

For photography, the recording speed at which the camera will save data is important.

On cards, the speed may be indicated directly, for example 95 Mb/s.

You can also find cards in which the operating speed is indicated in multiples, for example 600x. The multiplicity is always the same x=150 kb/s.

100x = 100 x 0.15 kbps = 15 Mbps. This speed went back to CD-ROMs (things that existed before the iPod and long before the iPhone). The maximum multiple speed is 633x (95 MB/s). For CF cards, the maximum speed multiple is 1066x (160 MB/s).

For example, Toshiba EXCERIA PRO UHS-II 16GB. Read and write speeds are 260 and 240 MB/s, respectively. This means that a gigabyte of data will be written to the card in 4 seconds. The main thing is that your camera supports this speed and bus (you will learn about it below).

Card class

The card class specifies the minimum guaranteed streaming write speed. For example, Class 10 corresponds to a speed of 10 Mb/s.

For video, it is not the peak speed that is important, but the streaming recording speed, otherwise there will be frame loss.

Since 2009, additional classes U1 and U3 have been introduced for SD cards (based on the new high-speed UHS bus). The classes provide a minimum speed of 10 and 30 Mb/s, respectively.

Example. Toshiba EXCERIA UHS-I. The card uses UHS speed class 3, which provides a minimum speed of 30 Mb/s. and although its maximum write and read speeds are 60 and 95 MB/s, this card is capable of recording video at 4K resolution.

Below is a table of correspondence between class and minimum streaming recording speed.

Recently, SD has developed new standards for card classes that will allow you to shoot video in 8K resolution.

What is UHS

UHS - (Ultra High Speed) ultra-high-speed bus that provides maximum recording speed.

• UHS-I supports speeds up to 104 MB/s
• UHS-II supports up to 312 Mb/s.

UHS-II cards can be identified by two rows of contacts.

Example

As you can see, the speed indicated here is 260 Mb/s. Roman I means UHS-I class. And U3 shows that the card supports 4K video shooting.

Which card to choose

• Shooting FullHD video - Class 10 cards, or class U1 series EXCERIA.
• Maximum Photo Recording Speed ​​– Choose the fastest speed UHS-II cards from the EXCERIA PRO series.
• Shooting 4K video using U3 class cards from the EXCERIA series.
• High recording speed + 4K video shooting - U3 class cards and UHS-II bus of the EXCERIA PRO series.

Buying a photo and video camera or another digital device, you probably paid attention to the entry in the instructions that you must use a memory card of at least N class. These recommendations should be taken seriously .

The quality of its operation depends on what class of memory card is installed in the device. On SDHC memory cards And microSD The class size is indicated on the card itself, the number is circled. In other cases, you need to consult with the seller or look in the specifications before purchasing.

Classification of memory cards.

Today there is 4 standard classes of memory cards: 2nd grade, 4th grade, 6th grade and 10th grade. You need to know that the class indicates the minimum speed of writing any information to the card. Speed ​​is measured in the well-known Megabytes per second. That is, Class 2 memory card records at a speed of at least 2 Mb/sec, 4 classes - at least 4 Mb/sec, etc. By declaring a certain speed, memory card manufacturers guarantee that the card's writing speed will be no less than the specified speed. At the same time, there may be more, which is what most often happens in practice. The card's read speed always exceeds the write speed.

Why is class rating so important for digital devices? It would seem that everything is very simple: the higher the class, the better the recording speed, and this is the card you should buy. But there are some nuances here. Tablets, phones, cameras, camcorders and other modern digital devices record at high speeds or have a small clipboard and require appropriate memory cards to function effectively. Thus, a class 2 card with the lowest write speed of 2 MB/sec is suitable for audio and video players, small devices that are not intended for active recording. The card is great for storing information. A card with 4 MB/sec recording is suitable for amateur digital cameras that shoot in JPG format and video cameras. Such cards are also used on DVRs. Yes, they include memory card And .

6th grade cards can be installed, for example, on semi-professional SLR cameras. The recording speed allows you to capture images like JPG, so RAW format. In mid-level digital cameras, they provide high quality shooting if other device parameters allow. The fastest and highest quality recording speed is provided Class 10 memory cards. They are designed to work with professional photo and video cameras and are supported by many modern car recorders. 10th grade cards allow you to record at the highest level available today Full HD video format, take and save photographic images in RAW. Cards of this type support memory capacity up to 32 GB, which is a definite plus for devices that require a large amount of memory to store information. Another big plus 10th grade cards is that they allow photographers to take burst shots with high image quality. InfoTech Company offers a wide selection memory cards in SD, SDHC, Micro SD and SDXC class 10 formats, which are suitable for use in car recorders, cameras, video cameras, etc.

The history of SD card development goes back more than 10 years. During this period, drives changed several generations, increased the maximum memory capacity, increased speed and became commonplace for the average technology user. Let's figure out how SDHC memory cards differ from SDXC and SD. We’ll also look at their characteristics and how to choose the right drive for your device.

SD drives are different from SDHC and SDXC.

The abbreviation SD stands for Secure Memory Card. This type of media has been produced since 1999. Of course, today no one uses cards in their original form for obvious reasons. Over time, the creators began to increase the characteristics and volume, releasing new generations, which will be discussed further.

The main difference, as mentioned above, is capacity. However, devices also differ in read/write speed and support across different devices (cameras, phones, etc.). There are 3 types in total:

• SD High Capacity;

Let's look at the differences between SD, SDHC and SDXC memory cards in all characteristics separately.

Volume difference

The oldest and most unclaimed type is MicroSD. The first generation holds only up to 2 GB of information (version 1.0) and up to 4 GB in version 1.1. These figures are currently extremely small for the modern consumer, given the size of the high-quality videos and photos that new smartphones and cameras produce. Such media may only be useful for transferring small files. It makes no sense to specifically purchase such media. FAT16 is used as the file system.

The second type is SDHC cards. They differ from regular SD ones in the increased amount of space and file system. Now the maximum capacity is up to 32 GB, using the FAT32 file system.

The most modern type is SD eXtended Capacity. The standard was officially released in 2009 and remains in demand to this day. Compared to the previous generation, the SDXC standard, which differs in volume, can accommodate up to 2 TB of information. File system - exFAT with support for formatting in FAT32.

Now you know the main difference between SDHC and SDXC memory cards, which you should pay attention to when choosing a drive for your device.

Device and operating system support

As of 2017, the SD generation is supported by all devices that have the appropriate slot. All devices that only support the SD standard will not be able to read information from HC or XC media. Cameras and smartphones that support SD eXtended Capacity are compatible with all three generations. There is no backward compatibility.

SD can also differ from High Capacity and eXtended Capacity in terms of support by operating systems:

• Due to exFAT, SDXC drives are not supported by the Windows XP operating system without installing a special update;
• MacBook and Mac OS have support for SD eXtended Capacity since 2011;
• flagship Android devices support SD eXtended Capacity. For all other smartphones and tablets you will need a special driver from Samsung.

Difference between Micro and Mini

Now let’s figure out how MicroSD and MicroSDHC memory cards differ from their Mini counterparts. As you might guess, the main difference lies in size. For compact equipment, a Mini version has been created, which is usually supported in smartphones (usually installed on the second SIM card slot). The difference between MicroSDHC, SDXC and SD is that they connect to the card reader without an adapter, while the Mini version requires an adapter.

Speed ​​difference

Now let’s look at the differences between all SD, SDHC, SDXC memory cards in terms of information reading speed. Speed ​​classes are marked on the case of each drive: 2 (from 2 MB/s), 4 (from 4 MB/s), 6 (from 6 MB/s), 10 (from 10 MB/s). The class designation indicates the minimum write speed, so in practice the performance of a single drive may be higher. Manufacturers indicate characteristics in Mb/s, and not according to the established classification. Also, SDHC and SDXC can support Ultra High Speed ​​technology (up to 25 Mb/s).

When choosing a drive, pay attention to its type and capacity. SDHC and SDXC are relevant today. Also, before purchasing, check compatibility with the device for which you are purchasing the media to avoid incompatibility.

Summary testing of 20 32 GB SDHC memory cards

Now, no matter what store you go to, there are a huge number of memory cards from various manufacturers on the shelves. They differ from each other in format, class and, ultimately, in the speed of reading and writing data. But how big is the difference in practice? This is what we will check in our new testing!

If you format the card using standard OS utilities or in a device that does not support the SDXC standard, it will end up with a different file system (for example, FAT32). The SD Association warns that the card will no longer be compatible with devices that support SDXC. Fortunately, for some card readers, cameras, etc. it is enough to update the driver or firmware.

⇡ Increase in speed: fast, faster, even faster!

Along with the capacity of memory cards, the data transfer speed also increased. In the early days of SD, it was measured in multipliers or “speeds.” One multiplier (or one “speed”) was equal to 150 KB/s - everything like CDs in their time. It’s just that such multipliers sometimes indicated the maximum access speed obtained under ideal conditions, be it reading or writing, and this is not the best option for the buyer. Therefore, the SD Associations decided to put an end to this disgrace, and in 2006 (SD Specifications V. 2.0), together with SDHC standard cards, four speed classes were approved for them: 0, 2, 4 and 6. Each class designated the minimum data transfer rate in decimal megabytes per second, both for reading and writing. Except zero class. This includes all cards released before the adoption of the specified specification, regardless of performance. A unified standard for marking memory cards was also approved: the number indicating the speed class was written inside the capital letter C.

Memory card speed classes

Alas, humanity is designed in such a way that it always lacks land, oil, minerals or memory card speeds. Therefore, in the next specification (SD Specifications V. 3.01 - the same one that describes SDXC cards), the 10th speed class was introduced, with a rating of 10 MB / s (again, in decimal format), and the UHS-I bus (Ultra High Speed, version 1), which could be used in SDHC and SDXC format cards. Using this bus increases the maximum theoretical data transfer rate to 104 MB/s (when the bus is supported by a card reader or other device) and does not entail any backward compatibility issues between new cards and older readers (provided that the latter support SDHC or SDXC formats).

On memory cards that support the UHS bus, you can find a mark in the form of the Roman numeral 1, and also a UHS bus speed marking - numbers 1 or 3 inscribed in a capital letter U. The first UHS class is equivalent to the usual tenth SDHC speed class (10 MB / s ), and the third speed class, as you might guess, should provide an access speed (sequential reading and writing) of at least 30 MB/s.

Then, in June 2011, the SD specification version 4.0 appeared, describing the UHS-II bus, which should increase the maximum throughput to 312 MB/s. In addition, the use of the UHS-II bus provides for an increase in contacts on the card by eight pieces. Separately, I would like to note the preservation of backward compatibility between UHS-II and UHS-I cards.

The Roman numeral II is used to mark memory cards that support the UHS-II bus.

As of this writing, data transfer speeds of 312 MB/s are still fantastic. And there are very few memory cards themselves that support the UHS-II bus; they cost the same as a good SSD drive, and with a larger capacity. Take for example Panasonic Micro P2: capacity 32 or 64 GB, maximum sequential read speed - 2 Gbit/s. Price - about 11 or 16 thousand rubles, respectively.

Memory card with UHS-II bus

It turns out that over the 14 years of its existence, SD memory cards have undergone many changes and were divided into several formats. But only reading devices, but not cards, are backward compatible with previous formats (see diagram).

⇡ Memory card labeling options. How not to make mistakes when buying?

Now let's briefly summarize everything that was said above. At the time of writing this article, SD memory cards of two formats may be available on sale: SDHC and SDXC. They differ from each other in maximum capacity and file system. The maximum capacity of SDHC is 32 GB, and SDXC - 2 TB, although in reality it is very difficult to find an SDXC card with a capacity of more than 128 GB. We were able to find the “largest” card with a capacity of 256 GB only from Lexar. It costs $399 on Amazon, but is not found in Russian stores.

Before moving on to further selection of a memory card, it is worth figuring out what capacity you need. If it is more than 32 GB, then you should go for SDXC and check all devices in which you plan to use this card for compatibility with this standard. It’s worth checking old card readers and cameras especially carefully, because modern equipment (unless we’re talking about a laptop with Linux and a camera from three years ago) should not have any problems with SDXC (or rather, with the exFAT file system). If your camera does not support SDXC, then you should search the Internet for new firmware and a description of it - sometimes the manufacturer can add SDXC support in the new firmware. As, for example, this was done with the Pentax K-x camera.

So, speed. In order to determine the approximate data transfer speed of a memory card, you need to look at its speed class and support for the UHS-I or UHS-II bus.

On some memory cards from among those that took part in our summary testing, we also found not only the usual tenth class marking, but also the speed indicated in the “multipliers” - this is a normal, albeit rare phenomenon.

The best option would be the card that has an established write or read speed tested by the manufacturer on the packaging or front side. When purchasing such memory, you can be sure that the sequential read or write speed will be higher than the minimum acceptable level for class 10. And for very expensive memory cards (for example, SanDisk Extreme Pro), the sequential read and write speeds stated on the packaging can reach values ​​of 90 MB/s. But in practice, memory cards with the specified speed are more expensive than others, which is quite normal - you have to pay separately for fast and tested memory. In addition, sometimes there are markings like “up to 60 MB/s” without indicating what type of data transfer this speed refers to - reading or writing.

The image below shows examples of speed class designations on memory cards. OltraMax card: simply tenth class; Transcend card: class ten supporting UHS-I bus and UHS speed class one; SanDisk: Class 10, UHS-I, Class 1 UHS-I and claimed speed of 95 MB/s.

⇡ Test participants, specifications

Our summary testing involves 20 different memory cards from different manufacturers - popular and not so popular. Among them there are both copies without a declared data transfer speed (but not lower than class 10), and cards with data transfer speeds of up to 90 MB/s. If the speed was indicated on the card packaging, but it was not written what it refers to (reading or writing), then so much the worse for the cunning manufacturer. In our table, we recorded this speed in the “read” and “write” cells labeled “total”.

Before moving on to the description of our experimental subjects, I would like to remind you about the cost of memory cards. We have indicated two prices in the table. The first is the average retail price taken from 3DNews, and the second is obtained using other sources. Since the prices are average, the cards we selected can be found in Moscow online stores even cheaper than indicated in the table. Everything will depend on the total number of offers on the market, the relevance of a particular memory card and, quite likely, on fluctuations in the dollar exchange rate in recent months.

⇡ Transcend Premium TS32GSDHC10, Premium 300x TS32GSDU1 and Ultimate 600x TS32GSDHC10U1

The trio from Transcend can serve as another illustration of the description of memory card labeling. The youngest card (Premium TS32GSDHC10) only indicates the 10th speed class, but the other two (Premium 300x TS32GSDU1 and Ultimate 600x TS32GSDHC10U1) indicate the 10th general and first UHS class, as well as speed in “multipliers” that are almost equal to the speeds in MB/s indicated on the packaging. This is roughly what manufacturers do when they want to make their cards more attractive to the buyer, because “300x” and “600x” at first glance look “more” than 43.5 or 87.9 MB/s, respectively.

Although the fastest memory card, Transcend Ultimate 600x TS32GSDHC10U1, has one advantage over other test participants. The manufacturer stated that it uses MLC memory, while on the packaging (and in the specifications) of other cards it is not possible to find a word about the chips used. However, the MLC (Multi-Level Cell) marking, by definition, can designate cells with both two and three (also called TLC) charge levels. Both options are used in memory cards.

⇡ Kingston Ultra SD10V/32GB, Elite SD10G3/32GB and Ultimate SDA10/32GB

There will also be three memory cards from Kingston, another well-known storage manufacturer, in our testing. The youngest card, Kingston SD10V/32GB, only has speed class ten, but other cards, Kingston Elite SD10G3/32GB and Ultimate SDA10/32GB, have stated read speeds of 30 and 60 MB/s, respectively. For Kingston Ultimate and 35 MB/s, write speeds are also stated.

⇡ SanDisk Ultra SDSDU-032G-U46, Extreme SDSDXS-032G-X46 and Extreme Pro SDSDXPA-032G-X46

SanDisk cards are a pleasant exception in our test. The thing is that all three cards from this company we use have a maximum access speed indicated. The youngest card, SanDisk Ultra (SDSDU-032G-U46), has 30 MB/s for sequential read, while SanDisk Extreme Pro has 95 and 90 MB/s for sequential read and write, respectively.

⇡ ADATA ASDH32GCL10-R, ASDH32GUICL10-R and ASDH32GUI1CL10-R

ADATA is a manufacturer of storage devices of various types and purposes. The company's product line includes RAM, external hard drives, solid state drives and SD cards. We took the last three devices from ADATA for testing.

We have before us an almost standard set of three cards: the simplest ADATA ASDH32GCL10-R class 10 without specifying access speeds and two more complex cards. Thus, the ADATA ASDH32GUICL10-R has an overall speed of up to 30 MB/s, and the most advanced one, ADATA ASDH32GUI1CL10-R, has a total speed of 95 MB/s for sequential reading and 45 MB/s for writing.

⇡ Silicon Power SP032GBSDH010V10, Elite SP032GBSDHAU1V10 and Superior SP032GBSDHCU1V10

Silicon Power can be called a direct competitor of ADATA, because on the official website of this company you can find almost the same range of products as on the website of the previous manufacturer.

The cheapest Silicon Power card - SP032GBSDH010V10 - only has speed class 10, but other models have speeds of 40 and 15 MB/s (Silicon Power Elite SP032GBSDHAU1V10), as well as 90/45 MB/s (Silicon Power Superior SP032GBSDHCU1V10) for reading and writing respectively.

⇡ OltraMax OM032GSDHC10, OM032GSDHC10UHS-1 and OM032GSDHC10UHS-1 95 MB/s*

The OltraMax company, unlike all other test participants, is practically unknown to the average consumer. But inside the packages of two fast OltraMax cards it is written that the company uses Samsung components - this is good advertising for the card manufacturer. The only pity is that in order to see such advertising, you need to buy a memory card and open the package.

The OltraMax trio is almost no different from the previous trios. The simplest and cheapest card from this manufacturer, OltraMax OM032GSDHC10, is marked only with class 10; the average memory card, OltraMax OM032GSDHC10UHS-1, also cannot boast of any marks other than class 10 and UHS-I. But the coolest card, OltraMax OM032GSDHC10UHS-1 95 MB/s*, promises speeds of about 95 MB/s, which is very interesting.

⇡ Qumo QM32GSDHC10 and Toshiba FlashAir SD-F32AIR(BL8

The next two cards are a little out of the general list. We received only one class 10 drive from Qumo for testing. And the Toshiba FlashAir SD-F32AIR(BL8) stands out because it is capable of providing access to content via Wi-Fi.

Memory cards with Wi-Fi have long been no longer considered something unusual or innovative - many manufacturers have such models, but their small variety hints at their modest popularity. Judging by the characteristics, you shouldn’t expect high speeds from the Toshiba FlashAir SD-F32AIR (BL8) - this card doesn’t even support the UHS-I memory bus. But it has Wi-Fi and even the ability to distribute wireless Internet if you add a name to the card settings and access password to another network