pay attention:
1, need to support the device OTG function!

2, U disk to FAT format partition, does not support NTFS format partition. This is the OTG protocol, not your love machine, but not the OTG adapter problem!
3, external mobile hard drive need additional power support!
4, because the brand mouse with different chips, can not guarantee that all the mouse can be identified. This is not the problem of adapter, because the phone is not the corresponding mouse driver