You can use a USB On-The-Go (OTG) adapter to connect your phone to a compatible USB memory stick or hard drive. For example, you can save your pictures on a USB memory stick without needing to connect to a PC.
Connect the micro-USB end of the USB OTG adapter (sold separately) to the micro-USB connector in your phone.
Connect a memory stick to the USB OTG adapter.
The Files application opens, and the memory stick is displayed as a mass memory
.
In Files, select and hold the file you want to copy, and from the pop-up menu, select the desired option and the target memory and folder.
If you connect a hard drive that requires more power than your phone can supply, an error message is displayed. You need to connect an external power source to the hard drive.