Answer to: Why can't I add files to my Toshiba external hard drive?If your Toshiba hard drive does not give you the paste option, just follow the steps: 1. Save any file in your hard drive Toshiba to another drive before you do anything! 2. Open Finder 3. Go to applications 4. open Utility folder 5. Go to Disk Utility 6. Select on the left of your window your Toshiba Hard drive 7. Select format: Mas OS ( journaled) 8. Click on Erase. And that's over. You can then paste what ever you on your hard drive. The name of your hard drive will, obviously change to Untitled. You can later rename, if you want.