Amazing MicroSD card. Read speed is over 100MBps on my Surface Go 128GB / 8GB model. Works great as storage expansion but if I try to do photo editing to pictures stored in this card direct, there's a delay in response. Got it on sale, so I'm very happy with the performance of the card considering the price point. I recommend this card.

Like other reviewer said, it came out as 367GB in my Surface but plenty of storage for my purpose.

Good value for the money. Get it while you can :)

400 gb in a micro SD card was unheard of 5 years ago. This sd card seems to be the best price for capacity available right now. Write speed is 50MBPS or so, but read speed is over 100MBPS

372.52 GB SD card. Not technically a weakness but I see this come upon nearly every review of high capacity storage: -The SD card is marketed as 400GB. Thats 400 GB assuming 1000 MB per GB, and 1000KB per MB. -Your phone/computer treats 1 MB as 1024 KB, and 1 GB as 1024MB. -This math works out to leaving you with 372.52GB of available space, not 400GB. A slight marketing ploy, but every single hard drive, ssd, and sd card is marketed like this.

I've been using mine in a Galaxy S8+ for a few months and only have 80GB left :) so far zero issues. I'm using it primarily for syncing my music subscription offline so I don't have to use so much data. Considering getting another one to keep permanently in my Microsoft Surface. Thats really the only way to expand its storage. Could also work well for 1080p video in a GoPro (not fast enough for 4K)