Dropbox is an online service that lets you store, sync and share files online. It works with Windows (XP and Vista), Mac OS and Linux. Previously available as invites only, Dropbox is now available to everyone. It is still in beta at the time of the review. The free registration has 2GB space allowance. Additional 50GB – which is the only option – is available for $99 a year (or $9.99 a month).
The free 2GB storage is handy as a USB drive replacement for shuttling files between work and home. Other great idea is as a home backup solution. This would reduce the hassle of getting external USB drive and plug it in to the computer at backup time.
The files on Dropbox system are stored in Amazon S3. Thus, Dropbox utilises most features and reliability of the S3. Dropbox works well behind the corporate firewall as long as port 80 or 443 (HTTP or HTTPS) are accessible.