You need to get that disk out of there and slave it to a PC so you can remove all your data. The connector and cable would only cost a small amount of money on e-Bay. Look for 2.5" hard drive caddy and make sure it comes with a three ended cable.
Alternatively, take it to a professional PC Fixer but do it soon -every time Windows runs, it's putting a strain on the disk..
Hard disks should only make a feint whirring sound - anything else is a warning sign.