You can do that by settings a Passcode which will be asked everytime you open G Cloud app on your device. However, this passcode won’t prevent G Cloud from running your backup automatically if you have scheduled the backups.

To set this code, please:

  1. Open G Cloud app on your device.
  2. Go to Settings.
  3. Look for the option Passcode and tap on it.
  4. Check the box next to Enable Passcode.
  5. Tap on Next.
  6. Enter the 4 digits code that you want and once you enter the last one, you will be asked to confirm your passcode, so re-type it.
  7. Now, your passcode has been set, so tap on Done.

If at anytime you decided to disable it:

  1. Open G Cloud app on your device.
  2. Go to Settings.
  3. Look for the option Passcode and tap on it.
  4. Uncheck the box next to Enable Passcode.