How to change the USB connection options on my LG Nexus 5

Click each step to see the action. You can also click the picture or use the arrow keys.

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You can connect your LG Nexus 5 to a computer using a USB cable. When connected, you can charge your phone and transfer files to/from the computer.
1. Plug the USB cable into the phone.
2. Touch and drag the notification bar down.
3. Touch USB for charging.
4. Touch the desired option (e.g., Transfer files).
5. The USB connection option has been changed.
The MTP (Media Transfer Protocol) and PTP (Picture Transfer Protocol) options have similar functions that enable file transfer between your LG Nexus 5 and computer. Select PTP to transfer pictures and select MTP to transfer music, videos and other media files.