Ukphail Silicon Power 64GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter

So far so good. Excellent speeds & able to transfer storage location for most apps.

Quality memory card, works just as well as the name brand cards at a lower price. Would buy again.

Nice card. Good functionality and great value for money

This memory card has been working without issues in my Android tablet since I got it a few weeks ago. The capacity is indeed 64GB as advertised. I have not benchmarked it for speed, thus I reserve the 5th star. But judging by perceived performance, this is a very good memory card.

Works well on my action camera

Not A2 random read/write speeds, screenshot from the app Cross Platfrom (no that's not a typo) Disk Test. Maybe the testing was different because I selected to use it as internal storage, have no idea. Good for the price but I wonder if an A1 rated SanDisk would have the same performance.2/13/20 EDIT: Just tested an A1 SanDisk Micro SD and the random read/write speeds were each about 1 MB/s slower than this one, so maybe they're slower across the board. Maybe unless it's "Superior Pro" or "Extreme Pro" in SanDisk's case.

Good for the money, I wasn't expecting it to preforme super well given its price but it actually has fast read/write speeds and more importantly it can hold and maintain those speedsunlike some other micro sd cards. Very happy would purchase again!