On Android devices you can usually pull down the screen from the top and see USB connection choices. If you want the change permanent try:
Android Phones For Dummies, 2nd Edition
- Open the Settings app.
- Choose Storage.
- Touch the Action Overflow icon and choose the USB Computer Connection command.
- Choose either Media Device (MTP) or Camera (PTP). Select Media Device (MTP) if it's not already selected.
On some Android devices you may have to search for the USB connection settings.