To install from the Photo Backup Stick USB drive, plug it into your Android device and open the My Files app:
- Tap the PhotoBackupStick.apk file.
- If prompted to allow to install from unknown apps, tap Settings.
- This will take you to the Install unknown apps settings page. Make sure to toggle switch is turned on under the My Files app.

- Tap Install.

- Tap Open on the next screen.