Samsung 128GB EVO Micro SDXC up to 48MB/s with Adapter (MB-MP128DA/AM)
- Up to 48MB/s transfer speed
- Great for Cell phones, Smartphones, Android Tablets, Tablet PCs.
- Great speed and performance for full HD video recording, high resolution pictures, mobile gaming, music and more.
- Water proof, Temperature Proof, X-Ray proof, Magnetic proof
- Compatible with devices with micro SDxC slots.
Samsung 128GB EVO Micro SDXC w/ Adapter – up to 48MB/s -UHS 1 – Class 10 Memory Card (MB-MP128DA/AM)
List Price: $ 97.99
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Does Amazon themselves now carry bootlegs??,
Then when I tried to move files into it, it wouldn’t take anything more than about 10GB. Photos would be randomly corrupted, and entire folder contents mysteriously vanishing/being deleted (but the folder itself still intact). Also had extremely slow performance; reformatting took 6+ hours!
These are signs of a bootleg card.
Asked for a replacement, and when I got it, wow the packaging was different.
The replacement had:
Front:
-Came with an actual adapter
-The printing is more vibrant, and the big picture in the middle is a thicker sticker than the first card.
-The picture is a tablet, versus a phone on the first card.
Back:
-Correctly labeled as MicroSD XC for a 64GB card on the top right of the back, not MicroSD HC on first card.
-“Ideal choice for premium smartphones and tablets”.
-English durability text.
-English-first product description text; no Chinese at all.
-10 year warranty instead of 5.
-Recycling/disposal symbols arranged differently.
-The card is MADE IN KOREA.
-The barcode has more information.
Wow get your stuff together Amazon, what the heck?? How did this get in your supply??
I really don’t want to start buying electronics from big box retailers for guaranteed genuine items but this is actually the THIRD time in a row I’ve gotten a bad card from Amazon (it was a Sandisk before this one), and I’m suspecting the one before was a fake now too since it exhibited the exact same symptoms.
Hope this helps anyone out there and took look out of you get these.
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|Great fast card. very good for phones and tablets due to high 4kb speeds,
In phones and tablets one of the most important things is not just the transfer speed but also the IOPs that the card can deliver. Many class 10 cards have great transfer speeds but terrible and I mean terrible IOPs, often a 5 year old card easily out performs them in IOPs.
This card delivers in both areas, fast class 10 transfer speeds 23mb read, 15mb write but also 482 write IOPs and 1668 read IOPs.
That’s IOP speeds that are slower than an SSD but way faster than a hard disk. Bare in mind that some class 10 cards give 4 write IOPs and you can see why I’m impressed. The only card I have seen outperform it in IOPs it the SanDisk Extreme Pro and they are seriously expensive and not available in 64gb. Testing against the third SanDisk I have, a 32gb ultra, is almost funny as the ultra only gives 15 write IOPs under the same conditions, making this card 30 times faster.
What does this mean for normal use, well it translates into an excellent general purpose card, that even if it doesn’t have the official fastest transfer speeds will actually perform much better in the real world. Which is why its getting such rave reviews on here for speed (so long as you get a genuine one!)
This was tested in my Dell Venue 8 tablet using the built in card reader. For the techies (if you’ve got this far then I assume you are)I am actually using it to run Server 2012 virtual machines in VMWare workstation and the performance is surprisingly good, I would even call it snappy!
Full Crystalmark disk scores below.
Sequential read 23.66mbs write 16.03 mbps
512kb random read 23.25mbs write 15.67 mbps
4k random read 6.40mbps write 1.850 mbps
4k random qd32 6.65mbs write 1.92 mbps
Parameters 5 iterations 1000mb sample size.
Tested on the 64gb Samsung Evo microsdhc.
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|Test results show this to be comparable to Sandisk class 10,
I tested with 64bit CrystalDiskMark and it’s very close in performance. The Samsung writes a little faster but reads a bit slower. As a rough metric I combine the read/write speeds, since you usally need to do both to transfer data – the Samsung is 40 while the Sandisk is 44 about 10% faster overall. If you’re using this for a video camera, then the write speed is more important and the Samsung outperforms the Sandisk.
As far as long term stability of the card, I’ve had a lot of off-brand cards and even after several years I’ve yet to have a failure, so I’d imagine the Samsung is every bit as good as the “no-name” cards.
>>>Samsung EVO Class 10
Sequential Read : 23.568 MB/s
Sequential Write : 16.343 MB/s
Random Read 512KB : 23.056 MB/s
Random Write 512KB : 21.477 MB/s
Random Read 4KB (QD=1) : 6.702 MB/s [ 1636.2 IOPS]
Random Write 4KB (QD=1) : 1.609 MB/s [ 392.8 IOPS]
Random Read 4KB (QD=32) : 7.376 MB/s [ 1800.8 IOPS]
Random Write 4KB (QD=32) : 1.389 MB/s [ 339.2 IOPS]
>>>Sandisk Ultra Class 10
Sequential Read : 31.053 MB/s
Sequential Write : 13.109 MB/s
Random Read 512KB : 27.086 MB/s
Random Write 512KB : 0.574 MB/s
Random Read 4KB (QD=1) : 3.217 MB/s [ 785.5 IOPS]
Random Write 4KB (QD=1) : 1.390 MB/s [ 339.3 IOPS]
Random Read 4KB (QD=32) : 3.073 MB/s [ 750.1 IOPS]
Random Write 4KB (QD=32) : 1.419 MB/s [ 346.5 IOPS]
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