Gmail is great if you want to store all your email content inside one single account, since it has more than 8Gb in size and increasing daily, you can save lot of information inside your Gmail account. Also, you can order to increase your account size for a few bucks per month. But given the problems that cloud servers and solutions demonstrate to happen it would be smart to keep backup of important Gmail content in another place.
Fortunately you can save all your Gmail content using Gmail Backup tools and restore backups in a later stage in case something bad happens.
This tool Gmail-backup is a free tool that will help you generating a Backup for your Gmail account.
In the opposite way, if you want to use your Gmail account as a backup target, and take advantage of the Gmail space to save your files there is another free tool that you can use for this purpose. FileBunker uses your Gmail space to save your backups, the application which uses one or more GMail accounts as its backup repository. Because each GMail account supplies 1000 megabytes of storage, it serves as an excellent facility for this purpose, however it may not be a recommended practice unless you want to run backups for a few directories of files, or you’d come that you are out of space soon.