Backing up files

Q. I’m looking for a private and reliable online file storage site, preferably free.
A. Dropbox http://www.getdropbox.com/ is awesome

Q. I’m looking for a free reliable and private site that backs up spreadsheets, docs, pdfs etc.
A. Take a look at Box.net . My whole organization uses it.

Q. Well i’m trying to share files between my computers at home and my friends. But before i start registering on random sites or installing programs i figured i would ask you guys. Any suggestions?
A. Ok. Mozy offers free data backup if you have a smaller amount to back up. And even if you have more than 2GB to back up, you can get unlimited backup for less than $5 a month. It is a pretty good deal. www.filebox.ro 1gb without reg.and 3gb with reg.

I have found many hosting companies, like X-Drive, that offer online file backup. what I want is a guarantee, by, say, a major insurance company, that insures that if a company goes out of business or files for bankruptcy, the files would not get lost.

this should be offered, but it seems none of the major file storage sites bother either offering such a guarantee, or fail to mention it in the FAQ or promotional material.

Thanks!