TF(micro-SD) CARD: 8G, 16G, 32G.
Regarding capacity and speed: there is a difference between the capacity of the factory product and the limited time capacity of the computer, which is caused by the different calculation standards;

Vendor capacity calculation method: 1GB=1000MB=1000000KB=1000000000 bytes; computer operating system capacity 1GB=1024MB=1048576KB=1073741824 bytes; the transmission speed is the manufacturer’s test result, for reference only, the actual read/write speed will vary depending on usage The device or file size is different.
Actual capacity:

The actual capacity of the product is about 90% of the nominal capacity, please refer to the actual capacity: 16G approximately: 14.5G, 32G approximately: 29.0G