You take the old drive and place it in some USB drive enclosure.
Then you plug it in and copy out your files.
I had a Dimension E521 that gave me a Keyboard error that seemed to be a motherboard issue. I scrapped the computer but before that I removed the Hard Drive. Now I need to know how I can transfer all of the data that i had stored onto another drive. I have an external 1tb drive that I can put all of the data on, I'm just lost on how to go about it. Any help will be greatly appreciated as I have a ton of photos and music stored on the hard drive that I would hate to loose. Data recover places want an arm & a leg (and a kidney) to recover all of my data, so I'm hoping that my CNET family can help. HELP!