Vansuny 64GB Micro SD Card, 2 Pack MicroSDXC Memory Card

Vansuny 64GB Micro SD Card, 2 Pack MicroSDXC Memory Card with A1 Class10 U3 V30 Full HD Video Recording TF Card (2 Micro SD Cards + 1 SD Adapter)

1GB=1,000,000,000 bytes. Due to the computer’s binary algorithm, actual user storage less.
Up to 90MB/s read speed; write speed lower. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes.
Performance results are based on internal testing conditions. Read/ write speeds may vary by host device.
The default file format of the micro SD card is EXFAT, and some incompatible devices can be formatted into FAT32 file format or NTFS file format before use

EmersonHenning says:

26/12/2023 at

Testing the 64GB versions of these with H2Testw shows the capacity is genuinely 64GiB, with a 36MB/s worst case incompressible sequential write speed, and a read speed of 87MB/s with the same data. This already confirms the UHS-I, U3 and V30 specs they claim.

Testing the A1 spec claim is more involved, but CrystalDiskMark showed Read IOPS of around 2000 for both QD1 and QD8 at 4k read, well above the 1500 IOPS spec for A1. It also showed Write IOPS of 880 & 895 for QD1 and QD8 at 4k read, well above the 500 IOPS write spec for A1.
Anonymous says:

02/12/2023 at

These beauties work as per advertised. The items arrived with 2 other orders alas to the next door neighbour. As he’s a bit of a nutter the driver, who was shouted at but kept his calm finally delivered my orders. Can’t get to speak to anyone regards the neighbour but if the driver reads this, the neighbourhood are sorry for the fool at number 4.