How to enable USB debugging on Android

USB debugging is a setting that lets a computer send commands to an Android phone over a USB cable. It is needed for developer tools and some repair, backup and screen-mirroring programs.

Step 1: turn on Developer options

Follow how to enable developer options on Android. It is a hidden menu opened by tapping the build number seven times.

Step 2: switch on USB debugging

1. Open Settings > System > Developer options.
2. Scroll to Debugging and switch on USB debugging.
3. Confirm the warning.

Step 3: connect and approve

1. Plug the phone into the computer with a data cable. A charge-only cable will not work.
2. On the phone, pull down the notification and choose File transfer (or MTP) if asked.
3. A prompt appears: Allow USB debugging? Tick Always allow from this computer only if it is your own computer, then tap Allow.

If the computer cannot see the phone

1. Try another cable and another USB port.
2. Check the connection mode (File transfer), and that the screen is unlocked.
3. Install the right driver for your brand if your computer asks for it.
4. Switch USB debugging off, then on, and approve again.

Do you need it?

Moving photos and files does not need it. See how to transfer data from one Android phone to another or how to back up an Android phone.

Switch it off afterwards

Debugging gives a connected computer deep access. Do not leave it on, and never approve a computer you do not trust or a charging kiosk. If you think you approved something by mistake, switch it off and see how to check your phone for malware.