I have been using Free disk space on the internet.I find it very useful.
Few Points to remember.
Make sure that the site is secure.
Evaluate the Sensitivity of the data that you want to store.
Evaluate the availability of data - ie. web based or does it need a plug-in / client s/w.
Response to the site for Uploading and Downloading data.
Do you ever have to stop and think about how to share, move, or back up the data you need? The usual solutions - floppy diskettes, CD-ROM, external disk drives, e-mail attachments, and overnight delivery services are cumbersome, expensive, and at times difficult to use. Free Internet storage can make files accessible from anywhere.
Data is available for you at any and all destinations where you have Internet access.