|The site||Free space||Best for...|
|Google Drive||5GB||Documents, because the interface makes it easy to edit them|
|Amazon Cloud Drive||5GB||Music, since you can play your stored tunes on any device with Amazon Cloud Player|
|Dropbox||2GB||Photos, because the site offers a viewer and makes it easy to share albums|
|Microsoft SkyDrive||7GB||Microsoft Office projects that you use from multiple computers, because the site syncs automatically|
|SugarSync||5GB||Documents you're collaborating with others on, since you can password-protect files|
You could drop $100-plus on an external hard drive to back up your PC or $30 a year for 25 gigabytes of space on websites that offer cloud storage.
A cheaper choice? Most of the storage sites in the table on the right provide around five gigabytes of room gratis. So open accounts on a few of them and cobble together a completely free system. The disadvantage is that your data are spread out, but you can download a free app from Otixo.com to help manage it all.
Just 10 years of aggressive saving can help you sock away enough money for a comfortable retirement.