About Google Adsense. Which is the better alternative?

I have a personal website, all about earning extra income from internet. So I talk about a lot kind of sites: pay per click sites, pay per read, high yield investment programs, etc.

The problem...

Do you know how much time information can be kept in a hard disk?

Do you know how much time information will be kept without being corrupted in my hard disk, if I leave it without use for a long term?

For example: I buy a 1Tb hard disk to save important...