The computer was never designed to know what to do with a dying hard disk drive. The 'hard disk drive', abbreviated "HDD" is a metal box with spinning platters inside that hold data magnetically. With this spinning-type hard disk drive, if for instance a read/write head is damaged and hanging loosely, the computer has no way of knowing this and will drag the head across a rotating disk, scratching the data off in the process everytime you plug it in! Computer repair shops may not necessarily know this and will plug a dying hard drive into a computer anyway, thus loosing more data.

We don't use computers to diagnose a bad drive. We only use data recovery hardware and drive imaging firmware. Our hard drive imaging hardware will fully interrogate the drive's firmware & hardware condition before turning it on. It can detect damaged heads & other faulty components while the drive is off, while a standard computer cannot. A standard computer will just keep dragging the broken head accross a spinning platter while trying to read from it -- ad infinitum!

The more you run this drive the more you ruin it and the less chance you have of getting 100% of your data back.