Jungle Disk is an application that lets you store files and backup data securely to Amazon.com’s S3 ™ Storage Service. S3 does not have an application So Jungle Disk provides you with one. Jungle Disk creates a network drive in your computer and you just drag folder and files over or you can setup an automatic backup. I’ve been using Jungle Disk foryears and it is outstanding. Jungle Disk use to cost $20 and you could use it on as many computers as you wished but now I think it is some sort of monthly subscription. I think it’s $3 dollars a month. The data backed up via Amazon S3 is very cheap as well.