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Get the most out of your smartphone or tablet PC with Samsung's EVO Select 128GB micro SDXC Memory Card. This high-performance memory card features read speeds of up to 80MB/s for transferring music, photos, and videos and is UHS-1 enabled to capture Full HD video. Waterproof, temperature proof, magnet proof, and X-ray proof, this reliable memory card ensures your files remain safe during life's little mishaps. An included SD adapter lets you use the card with your digital camera, laptop, or desktop computer.
Most helpful customer reviews
401 of 425 people found the following review helpful.
Meets advertised speeds. 64GB, 128GB and 256GB comparison
Update 8/25/2016: Added the 256GB card to the comparison. It was much faster write speed and met the 95 MB/s read and 90MB/s write claims!
I tested the 64GB and 128GB cards. Both cards exceeded the advertised speeds (80MB/s read and 20MB/s write). The 64GB card provided higher read and write speeds compared with the 128GB card. The 64GB card showed very high 512K random read and write speeds, the random write speeds exceeded the sequential writes.
I tested in several different USB 3.0 card readers, the highest benchmarks:
EVO Select 64GB
Sequential Read : 97.361 MB/s
Sequential Write : 25.626 MB/s
Random Read 512KB : 88.232 MB/s
Random Write 512KB : 64.917 MB/s
Random Read 4KB (QD=1) : 9.424 MB/s [ 2300.8 IOPS]
Random Write 4KB (QD=1) : 1.717 MB/s [ 419.2 IOPS]
Random Read 4KB (QD=32) : 10.423 MB/s [ 2544.8 IOPS]
Random Write 4KB (QD=32) : 1.445 MB/s [ 352.8 IOPS]
EVO Select 128GB
Sequential Read : 82.839 MB/s
Sequential Write : 22.677 MB/s
Random Read 512KB : 72.126 MB/s
Random Write 512KB : 5.837 MB/s
Random Read 4KB (QD=1) : 4.969 MB/s [ 1213.1 IOPS]
Random Write 4KB (QD=1) : 0.898 MB/s [ 219.3 IOPS]
Random Read 4KB (QD=32) : 5.396 MB/s [ 1317.3 IOPS]
Random Write 4KB (QD=32) : 0.122 MB/s [ 29.8 IOPS]
EVO Select 256GB
Sequential Read : 95.664 MB/s
Sequential Write : 89.637 MB/s
Random Read 512KB : 82.579 MB/s
Random Write 512KB : 54.243 MB/s
Random Read 4KB (QD=1) : 5.931 MB/s [ 1448.1 IOPS]
Random Write 4KB (QD=1) : 2.820 MB/s [ 688.4 IOPS]
Random Read 4KB (QD=32) : 8.474 MB/s [ 2068.8 IOPS]
Random Write 4KB (QD=32) : 3.596 MB/s [ 878.0 IOPS]
4 of 4 people found the following review helpful.
Great capacity, consistent performance, falls short of U1 spec by a hair
By arnaud lacour
I have spent more time than I would otherwise do to test this card because there is so much uncertainty these days with the quality of products, especially with counterfeits flooding the market.
This card is genuine and legit.
The test below shows something a little different than what the benchmark tools will reveal.
This is closer to the real performance you are likely to get when recording video on the card.
Video is usually buffered and written in fairly large chunks to the storage because that is the use that yields the best real life results.
With regular SD speed classes becoming increasingly less readable for consumers, the U classes came to simplify the landscape a bit and U1 is meant to indicate that a card support AT LEAST 10 MBps throughput. This one here falls short, albeit by a very small margin, but short none the less. I have written 1GB files in 100 iterations to both test that the card had the indicated capacity and that performance held throughout.
I am pleased with the consistency,
but displeased by the fact that it consistently misses the mark by a hair.
138 of 153 people found the following review helpful.
Stick with the brand names to avoid fraud. Don't go generic
By Obi Wan
Stick with the brand names when buying Micro SD cards. Samsung cards are proven and reliable. The EVO Select line is a new upgrade to their existing EVO and EVO+ line of cards. I'm sure it's a fine product as every Samsung SD card I've ever used has been fantastic. (And I've used a lot of them)
Just make sure you are getting a legitimate Samsung card when you purchase this. There are a ton of fraudulent cards out there that claim to be large capacity but are in fact low capacity low speed cards that have had their control chips hacked so they report themselves as being high capacity to your computer/tablet/camera/phone. As such your device will try to write more data to the card than it has in legitimately available storage and your data becomes corrupted or lost completely.
Samsung cards are one of the 2 favorite brands that have their designs copied by fraudsters to fool you into buying fraudulent products. (SanDisk is the other one) They copy the color scheme of the cards, the font on the label, and everything else so you just focus on the low price but don't notice things like the brand name being things like SANSHEN (That is a real example. Someone sold a SANSHEN card that was visually identical to a SAMSUNG card in every other way). Don't fall for it. Stick with actual name brand products and check the seller reputation before you buy.
There are also people who completely copy everything off the card label, including the SAMSUNG name (Or SanDisk, or Kingston, or whatever the case may be). To make sure you got an actual Samsung card be sure to check the color of the plastic housing. Samsung has used white plastic for their micro SD cards for a few years now. When the fraudsters do it they often slap an identical Samsung label on a black plastic card, because black cards are easier to come by. These kind of fraudsters often intermingle their stock with the legitimate listing like this one. It's only a problem if you are buying from 3rd party sellers. Most 3rd party sellers are totally honest. But be careful and check seller feedback before you proceed. Honest sellers will almost certainly welcome you to do so.
And no matter what brand of card you buy or who you buy it from, as soon as it arrives you should test it with a utility app called "h2testw". You can download it free. Just do a search for it on any search engine and you'll find it. That app writes single bit data to the drive until it's full, then it reads that data back to make sure it's readable. It will tell you what the actual capacity of this disk is. If you have a fake capacity card from a fraudster it'll tell you right away because the capacity will be really low (like under 16GB). But it's also useful for testing legitimate cards like this Samsung card because even legitimate brands have bad cards due to manufacturing errors. That app will show you if a legitimate card simply has a bad chip that isn't working properly. So then you'll know right away before any return period expires.