Samsung Pro microSDXC UHS-1 U1 Card Review (64GB)

A few months ago Samsung launched their new series of SD and microSD cards. They are segmented into three categories. The lowest being their Standard series for the typical every day, non-performance oriented consumer. Next up is their EVO series, marketed towards those who want a little more performance out of their storage with transfer speeds up to 48MB/s. Finally, they have their Pro series, aka professional performance.  Their Pro series cards are advertised for read speeds up to 90MB/s!

For this review, we have the Samsung Pro microSDXC 64GB card. This is a UHS-I U1 speed rated SD card, thus it should provide those with the need to record HD and 3D video ample write bandwidth and consistency to do so.

Samsung Pro microSDXC 64GB Package Angle


  • Available in 16GB, 32GB, and 64GB capacities
  • USH-I Speed Class U1 compliant
  • Compatible with microSDXC/SDXC Card and SDXC USH-I Card enabled host devices
  • Seq. Read/Write speed up to 90/80MB/s
  • Working Voltage: 2.7V ~ 3.6V
  • Weight: 0.017 oz.
  • Water, Shock, Magnet, and X-Ray Proof
  • Operation temperature: -25C to 85C
  • Standard 0.59″ x 0.43″ x 0.04″ (WxHxD) microSD card dimensions
  • 10 Year Warranty


The card comes in a white blister package to highlight the product with specifications listed on both the front and back.  On the back it depicts that the cards are water, magnet, temperature, and x-ray proof.

Samsung Pro microSDXC 64GB Package

Not only does it contain the microSDXC card, it also comes with a microSD to SD card adapter for those who do not have microSD card readers or those who may be using this card in a device that only allows for storage in the standard SD card format.

Samsung Pro microSDXC 64GBSD Card Adapter

The Samsung Pro microSDXC card is rated for a max of 90MB/s read and 80MB/s write speeds. To me this is quite fast for something as small as my fingernail! It also comes with a 10 year warranty. While this is quite a lengthy warranty, and matches that of their new 850 Pro SSD product line, it is still short of the lifetime warranty we usually see from other SD card and USB storage device manufacturers.

Samsung Pro microSDXC 64GB Front Samsung Pro microSDXC 64GB Back

The card styling is quite appealing to me, rather than the basic black, it is a two tone white and grey. On the front is the listed capacity of 64GB, when formatted it is actually allows for 59.5GB of usable space to the user. The Samsung Pro microSDXC cards also come in 16GB and 32GB capacities. Current going prices are around $25 (16GB), $35 (32GB), and $60 (64GB). Finally, on the back are the model numbers and “made in Korea” stamp along with the connector pins.


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    I ordered it now at ebay i Hope i get an original. Ill use it with my new Sony xperia z3 Compact. Ill update how it perform. 😉

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      haha just bought one for my Z3C too. Perfect match, handles 4K brilliantly.

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      Its a really bad idea to buy any storage media off ebay, as its flooded with fake stuff.Its all fun and games until you realize your 64GB card is really just 4GB with hacked capacity.

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    Seriously a lot of fakes. I bought from fry’s and it was a fake Samsung. They refused to return because I didn’t have the box like it mattered! but really a lot of fakes.

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    Is it good enough to record 4k videos on Galaxy s5?

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    Is there anyway that you can do a benchmark with A1 SD? This would really help for people who want to use them in phones. Random read and write are what’s important!

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    Sean, You should use Kingston MobileLite G4 – significantly better speeds.

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    Bought this. HOLY…..this thing is wicked fast!

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    Important correction:
    Actually, your results are incorrect in the region of blocks 32k OR less. I observed this behavior on my external(!) reader too. 64k and more gives >60MB/s, but 32k or less gives <9MB/s(read) and < 25 MB/s. (overlapped IO does not it affect much).
    In internal reader:
    neither (overlapped 1)
    16k : 48/56, 32k: 57/63;
    overlapped 10:
    16k: 55/63. 32k:64/71
    There is obvious continous speed developement if the card is in internal reader. There is a gap if the (my and your) reader is used between 32k and 64k

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