A free app for Android, by KyuuDroïd.
This app is a handy utility to open the files on your device or SD card reader, or any other device with an USB OTG port, and copy them to the internal memory of your device. It works as easy as a copy and paste. No complicated steps, no root privileges, no special knowledge is required.
You will be able to open your files with any compatible application (such as VLC, or Simple Music Player) or play them directly from the app itself.
What's more, if your device supports multiple units, you can now choose which one you want to open, and it will open in the same way as if it was a single unit.
