Unlinking a device will delete all the backups you made on that device. If you do not have a local copy of your files, make sure that you download them first.

  1. Tap the menu button.
     
  2. Select Files.
     
  3. Select All files
     
  4. Tap the the option button on the device you want to unlink.
     
  5. Tap Unlink.
     
  6. Confirm that you want to unlink and delete all files from that device.