Dropbox normally provides 2GB of free storage with its accounts as a free incentive to check out their services and features. If you are coming close to your 2GB limited and fancy earning a little more. Dropbox is offering a nice 4.5GB of data storage to users who would like to beta test their. The beta testing update will provide you with 500MB of free space when you hit the automatic upload option, then 500MB more each time you hit the limit up to 4.5GB more total.

Dropbox David E explains:

"Another day another build. We’re trying to snipe all the most common bugs. Keep plugging in those cameras!
During this beta period, we are also offering additional free space to test automatic uploading of photos and videos. For every 500MB of photos and videos automatically uploaded, you’ll receive another 500MB space bonus, up to 4.5GB total. [Update: To clarify, you can get up to 5GB of free space with this feature, if you count the initial 500MB space for the first photo import].”

Dropbox is also running a beta testing of their official Dropbox Android app with other enticing data giveaway, to test the release of an experimental beta Dropbox Android app v2.0.9 that includes a brand new automatic Camera Upload feature.

Source:  DropboxDropbox