Best SD Cards Reviews 2017

Having a reliable SD card or memory card is very essential nowadays are they’re being used to store important data in smartphones, digital cameras, laptops, and more.

They are also very small, so having lots of them to keep some of your photographic images, important data, and favorite songs would be very easy and handy.

In this article, we’ll show you some of the top SD cards being sold in the market right now. We’ll also briefly highlight each of their best features, so you can quickly decide which SD card brand to choose.

Continue reading to learn more about them.

Samsung EVO 32GB Class 10 Micro SDHC Card

Samsung EVO 32GB Class 10 is one of the best micro SD card deals available now and is likewise one of the most common victims of imitations.

There’s an easy way though to find out if you’re purchasing an authentic Samsung SD card. That is by checking thoroughly the design. The back and the edges of the genuine Samsung SD card are semi-gloss black and white respectively, while the front is vivid white with a blend of orange.

When it comes to performance, Samsung EVO is superb. Being a class 10 microSD card, it delivers as promised by easily recording read/write speeds of 23MBps and 15MBps respectively.

Its read/write IOPS (input/output operations per second) of 1668 and 482 respectively may be slower than solid state drives, but they are way faster than hard disks.

Samsung EVO may not be the fastest, but it’s certainly one of the most reliable in terms of efficiency.

SanDisk Ultra 32GB UHS-I/Class 10 Micro SDHC Memory Card

SanDisk Ultra Micro SDHC is another affordable SD card from a very reputable company. For regular users of tablets and phones, this should be enough storage for important files, pictures, and other stuff.

Most benchmark tests performed on this microSD card are remarkable. On a PC, you can get as much as 45 MB/s and 35 MB/s respectively for read and write speeds.

Tests made on Android phones likewise show a respective average read/write speed of 30MB/s and 14 MB/s. There’s obviously not that much write speed.

However, this shouldn’t be a deal breaker as it seems durable. You can use it for several months without experiencing any issues saving or transferring files.

For the price, this is a good SD card that over-delivers.

Kingston Digital 16 GB Class 4 microSDHC Flash Card

Kingston Digital 16 GB is a Class 4 microSDHC card which means it’s capable of delivering data transfer rate of 4 MB/s. This is not the top speed you can get from a microSD card, but should be fairly fast enough for most electronic devices like tablets and smartphones.

Just make sure that your device supports the microSDHC format. If it’s one of those older devices, then you’re better off with micro SDs instead.

For small files sized 15MB or lesser, Kingston Digital can guarantee a write speed of 6.5MB/s-10MB/s. It may take a couple of minutes writing large files over 1GB as its write speed may only range up to 10 MB/s. Its read speed, however, is consistent at around 16MB/s. This is regardless of the size.

As a Class 4 micro SDHC card, it easily exceeds its specifications. Its speed is fast enough and it’s priced relatively low.

SanDisk Ultra 64GB microSDXC UHS-I Card

SanDisk Ultra microSDXC UHS-I is incredibly small and light, but it does not feel flimsy. Just be careful when using it. If it’s you’re first time inserting the card into your tablet or phone, always push it down carefully into the adapter. Whenever necessary, use your fingernail to unseat or pull it out of your device. If it doesn’t fit, just don’t force it. Otherwise, you’ll wear out its contacts.

Performance-wise, this inexpensive SD card is fast. It’s in fact quicker than a USB flash drive. It can offer you a read and write transfer rate of over 80MB/s and 15MB/s respectively. The latter may not be extremely high-speed, but the write speed should be good enough to handle most files and applications.

SanDisk Ultra Plus can be best tested on higher-end cameras that are rated for UHS-I. This is especially true on DSLRs which have larger lenses and broader aperture.

SanDisk microSDHC 32GB Flash Memory Card

For sure you’ve seen a couple of read/write speed test results from various benchmark programs like Flash Memory Toolkit v2.0 and H2testw v1.4.

SanDisk microSDHC is rated Class 4. Unlike other cards of its class, SanDisk microSDHC can give you amazing results in terms of write speed depending on the size of the file.

Write speed for smaller files, sized 5MB or lesser, may range from 15 MB/s to 17 MB/s. This is way faster than cheap SD cards, rated higher than class 4, which can only offer at most 10 MB/s.

Writing files that are more than 10MB may also take about 8MB/s, while 1GB files may receive an average of 5.5MB/s.

Meanwhile, read speed may reach up to 20MB/s. However, this may also be limited by the highest speed of the card reader that’s in use in your device.

What to Look For When Buying an SD Card

Speed Class

Fast SD cards are always better options for those who work in a quick-paced environment. If you’re, for example, a photographer who takes and saves pictures and videos in high-resolution format, you would need a new SD card that’s fast to get files transferred quickly.

There are four speed classes — 2, 4, 6, and 10.

Class 2 is the slowest, while Class 10 is the fastest.

Class 2 is best-suited for video recordings saved under standard definition, while Class 10 is perfect for full high-definition video recordings.

On the other hand, Class 4 and 6 suitable for video recordings saved under high definition.

Data Storage

SD cards save files the same way as other storage media like hard drives, USB flash drives, and solid state drives.

They also come in different amounts of storage.

Now, there are three types of SD cards: SD, SDHC (High Capacity), and SDXC (Extended Capacity).

In the late 1990s, SD was first introduced to hold a maximum of 2GB of data using the FAT-16 file format.

In 2006, SDHC was created to allow saving up to 32 GB of data using FAT-2.

In 2009, SDXC was massively produced to offer up to 2TB of data using Microsoft’s exFAT format.

Physical Size

SD cards come in different sizes: standard, miniSD, and microSD.

Standard-size SD cards are small, but they’re the largest among other types of SD cards. Standard SD cards measure 32x24x2.1 mm and only weigh two grams.

MiniSD are smaller than standard SD cards as they only measure 21.5x20x1.4 mm and weigh lesser than one gram.

Moreover, microSD cards are the smallest SD cards to date. They measure 15x11x1 mm and weigh about 0.25 gram.


Before settling for an SD card deal, don’t forget to check what your device supports. If you’re not sure, ask your device manufacturer so you’ll know what speed and capacity will work for you.

In order for you to become more productive, always aim for a higher speed class and capacity.

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