Just a thought for you all.
I use this piece of software on my mac (works on pc too).
It backs up constantly whatever data you tell it (you don't notice) to their servers on the internet, photos, movies, documents etc.
I currently have around 250gb (yes two hundred and fifty gigabytes) backedup and it costs me around £12 per month.
I restore anything when I like and I can even restore 'versions' of files for example, a certain excel file from last Wednesday.
Remember, your hard drive WILL die one day, surely your data is worth far more than the computer it's self?
You can also FREE OF CHARGE back up to another computer on your network or to a friends computer over the internet and they can backup to you FREE OF CHARGE.
CrashPlan – Automatic Offsite Backup