•About Speed:
How to verify the Capacity and Speed of the memory card?
1. Please use quality USB 3.0 card reader to verify all memory card by H2testw on PC. Real memory card should pass H2testw with no error.
2. Please don't use cheap card reader to test Micro memory card, speed of Micro memory card will be reduced by low quality card reader.
3. Micro memory card speed is greatly affected by card reader and the capacity you choose , USB port ect. Low quality device will 100% slow down card speed,1MB=1000KB.
•About capacity
The factory capacity of memory card and USB flash drive products is usually calculated according to 1MB=1000KB, 1G=1000MB and the operating system uses binary algorithm: 1MB=1024KB, 1GB=1024MB.
Therefore, there is a certain difference between the display capacity of flash memory products and the nominal capacity, which is about 90%.
Therefore, the general 8G USB flash drive/memory card actually does not reach 8G, and most of them are about 7.2GB.
This is the normal range of capacity (the standard capacity is 4GB, 8GB, 16GB, 32GB, 64GB, etc., the actual used capacity is about 3.6GB, 7.2GB, 14.4GB, 28.8GB, 57.7GB, etc., and so on)
• Copy large files above 4G
In order to be more compatible with the system, the factory default format of the product is FTA32 (Microsoft's default disk format), and a single file copy does not exceed 4GB.
If you need to store more than 4GB of files, please reset the USB flash drive format:
1. Connect the USB flash drive to the computer
2. Right-click the USB flash drive partition and select format
3. Select NTFS or exFAT format in the file system options
4. Click start and finish.