Came already formated in exFAT with 238gb of free space.

Speeds were tested on a sub 3.0 hub connected to the computer which is more than enough able to stress the card.

Read speed is a bit far from advertise speed at 97mb/s. Not even in the 3 digits, but close. Although nobody will feel the difference between 97 and 120 unless you’re using it to browse a massive library of picture and even then it should be a small difference.

Write speed are a bit slow though at 36 mb/sec. But, his is just a U1 with a minimum speed of 10mb/sec and perform like a U3 over 30mb/sec, but when comparing it to the read speed, it’s closer to 1/3 of the speed.

For application use, the IOPS count get more important. The A1 specs ask for 1500 iops read and 500 iops write and a minimum of 10mb/sec sequential write (do NOT compare it with computer hardware where for example my NVME Samsung 980 pro 2TB give 120 000 read and 97 000 write in iops ). Here once again the card deliver with about 2400 iops read and 710 write which is above specs and with the 36mb/sec sequential write fill the specs.

In conclusion, this is a card advertise to be a U1, A1, so in the bottom of the classes of micro SD nowadays and is represented by the price, which is one of the least expensive card in the reputable manufacturers you can get. The “reputable” part come with the 10 years warranty from Sandisk and the long lasting reputation of the company in media storage. The card although deliver more than what is advertised in a lot of fields since it perform like a U3 and is close to twice the specs of the A1 class.

This card is intended to increase the raw storage of a device but not as a powerhouse of transfer. It will be perfect to extend your phone or tablet storage, but might rush a little bit to run a lot of application from it. If you adopt it for picture and video storage and use the onboard memory for applications this is a very good choice.

Product I received seems to be genuine. I ran some tests which showed that there was a full 128 GB (more like 121 GB) of storage. However, sequential read/writes and also random reads/writes are abysmal at less than 100 MB/s read and a rather disappointing less than 50 MB/s write. Speeds are nowhere near the advertised speeds.
I should’ve gone for Samsung EVO 128 GB which is a UHS 3 capable card at about the same price(as of today).

NOT recommended.

The MSD card is ok, but the claimed capacity of actual storage space of 64GB is far from truth & misleading. The actual available storage capacity is only 59GB and not 64GB. This is utter dishonesty on the part of the SanDisk Co. & comes under the purview of Sec 2(11)& 2(47) of the Consumer Protection Act, 2019.

I just searched for the cheapest memory card, and although with sandisk as the brand name its easy to believe/ trust their product.
The transfer rate wont be as mentioned on the pictures as while transfering from memory card to PC it gives upto 20–25 mbps and while transferring from PC to memory it will give only 7-8 mbps speed.
For capacity check the picture – out of the box it takes up 4.5 gb out of the 64 gb memory and gives u 59.5 usable space.
Overall packing is good, delivery was late.

スマホ内の512GBが残量僅かで、1tbで2万円切る超お買い得最安値で不安でしたがニセモノならアマゾンは返品返金可なので人柱のつもりで注文。ニセモノSDカード発見アプリのH2testwで300GB分（1tb全部なら丸一日掛かりそうなので）チェックしたところホンモノ判定!ノートPCでCrystalDiskMarkで速度チェックしたらread87.04write26.21と古いi5ノートPC、カードアダプターのせいかもですが書き込みが遅すぎかな?あらかじめバックアップ用に外付けにまとめておいた600GB分のファイルを半日以上（片手間でやったので丸一日だったかも）かけて転送。Xperia8（ワイモバ版。ネットの評価はかなりクソ味噌ですが通常使用では問題無しだと思います）でＦＨＤの動画もコマ落ち無くシークも問題無く再生出来ました。はっきり言って使用感は512GBと差を感じません！こち亀全200巻やアニメシリーズ全話とか入れまくってもまだまだ余る!後は数カ月後の劣化耐久性という事で不具合出たら追加レポします。

It’s a fake product. Its maximum speed to copy file is max 30MB that’s it. As mentioned in description it is not