You can backup any type of files with IDrive-E absolutely no limit on the upload or download size for backup and restore. IDrive-E retains 30 versions of backed up data. Each backup creates a new backup set that is identified by the date and time. You can restore up to 30 prior versions, including the most recent version of your data files. You can also restore latest versions of all your files or versions of files. IDrive-E does incremental backups that transfer only portions of file that have been modified or changed since the last backup.

For ease of use, the application has two interfaces to work with. IDrive-E Classic view offers a very simple and intuitive user-friendly interface similar to the native Microsoft Windows explorer to
backup and restore files and folders. You can also schedule your backup for a future data and time, exclude files and folders, delete entries in the backup set – all to suit your needs.

IDrive-E Explorer view is a virtual drive with Windows Explorer-like view. IDrive-E Explorer view is meant for restoring files and folders and is not for backups. You can browse your IDrive-E account contents, restore files and folders with a simple drag-and-drop or copy-and-paste operation, view history of files, drag-and-drop or copy files to local drive (restore file versions) and search for files and folders backed up in your IDrive-E account. All data stored on the IDrive-E servers is encrypted using a secure key with a user supplied password known only to the end user. IDrive-E uses industry standard AES 256-bit encryption* on storage.

You should also take a look at Bytefortress, I use them and couldn’t be happier with their service. With their service you can backup your entire web directory (Including files and databases, etc.).