Welcome to the Jungle Baby!

Jungle Disk Desktop Edition lets you store files and automatically backup data easily and securely to Amazon.com's S3 Storage Service.

Jungle Disk is more than just backupMost online backup services can only be used for basic backup. You select the files you want to backup and if you need to restore, you use their proprietary software or web page to select the files to restore, often waiting several minutes or hours before you can access your files. Jungle Disk has a great automatic backup system, and can easily be used for basic data backup, but Jungle Disk also gives you a complete network drive that you can use from multiple machines - like an unlimited size USB drive that you can connect to from anywhere. The exclusive caching features in Jungle Disk make it so that using your network drive is as fast as a local drive, and you don't need to constantly transfer data from the server.
This also allows you to use your favorite 3rd party backup tool such as ChronoSync, SyncBack, or rsync to manage your data if you prefer - something no other online backup service offers.