The micro sdxc card is not legit and it’s not worth the money, the 400gb sdxc card that I purchased was actually a SanDisk brand 400gb, once purchased the pictured had changed to a different brand called a micro sd card 400gb then once I did actually received it, it was the total opposite brand Called Termanik 400gb micro sdxc card than what I picked and purchased. This is false advertisement 100%. Now I’m skeptical on purchasing anything from amazon regarding electronic wise items in the future. Do not Buy Micro SDXC card not Legit! Amazon needs to have their own tech crew checking to make sure it’s correct item being bought and shipped. Amazon should have more better knowledge on what they are sending out to their customers especially anything pertaining to electronics.
I bought this 400GB card to store music for my DAP. Upon getting it, I fired up h2testw and tested it. There was 366GB (GiB?) of exFAT formatted space on the card. It all tested OK. 366GiB is 392GB, so I suspect the discrepancy is just the labelling.
Through my Thinkpad T420's PCIe-connected SD card reader, I was able to get completely stable 46MB/s write and 80MB/s read throughout the entire test (like, zero speed fluctuations at any point, which I was rather impressed with). I suspect my reader is limited because of the weirdly precise 80.0MB/s upper limit, so I would have gotten something like 93MB/s read like other reviewers if I used a better reader.
Overall, great card, and staggering capacity for this price ($85) and speed that won't take you hours and hours to fill up. Just make sure to get the one sold/shipped by Amazon to avoid getting fakes, and use h2testw to test any SD cards you buy just in case.
This micro sd card, although not the fastest, is great for storing things such as pictures and videos. I've been using it for about a week or two now and it's been working like a champ since I've installed it. The SD card size adapter is functional and works just as well as it should (can't speak much for the speeds on this). Overall, I would say the micro sd card is a great buy (especially for the price) and I would definitely buy this product again.