A USB flash drive is an electronic device that can be used to store data. It is a type of storage device that is used in place of a hard disk drive (HDD), which is a type of computer data storage device. A USB flash drive can be used to store data, such as images, audio, and video, and it can be used to transfer data between a computer and another device. It can also be used to read data from a microSD card, which is a type of memory card.

The USB OTG File Manager allows you to open and copy files from any USB mass storage device with a FAT32 or NTFS filesystem using the USB OTG port of your device, tablet, or phone. It can also be used to open and copy files from any USB card reader.