Dropbox is a web-based cloud storage system that allow users to store, sync, and, share files online. The client works on Windows, Mac, Linux, iPhone and iPad devices. With Dropbox a copy of your files are stored on Dropbox’s secure servers, this lets you access them from any computer or mobile device . And with only a few clicks, you can Share these files to your friend.
With Dropbox, file syncing has never been easier. A free Dropbox account gives you 2 GB of storage which is good enough for most people. Pro versions for 50 and 100GB for only $9.99 and $19.99 per month. Dropbox also offer referral incentives for free memory upgrades: invite friends and get 250MB extra storage for every friend of yours who signs up (up to a limit of 8 GB)!