When you give away your computer, digital camera, video camera, experts (like Urban Net) can recover data that you previously had (even after formating).
You may want to donate or sell your old device but you don't want the new owner to have access to your old private staff. Well data recovery it is not illegal nor is it dangerous, but once you give away your device with a data storage, the new owner can do whatever he feels like, including try to recover data (not necessarily yours but your deleted staff will appear to). That is when Secure Hard Drive wipe comes in handy. Urban Net knows how to wipe all your information so that no one else could recover.