BitTorrent is good for more than just downloading files of various natures, it has a tool called Sync which performs a similar task to solutions like Dropbox only more privately and apparently with more speed.  From the graph below you can see that in at least one scenario BitTorrent Sync is significantly faster than other solutions when it is allowed free reign on your connection, you can limit the speed in the settings if time is not of the essence.  What is also very important to note is that this is purely an encrypted client to client transfer, your files are never cached on a server for posterity or for 'quality assurance' as they are when you use the competitions software.  That does mean both devices need to be powered on and on the network for this to work but for many the privacy would be worth the slightly less flexible operation.  Check it out on Slashdot.

"Now that its file synchronization tool has received a few updates, BitTorrent is going on the offensive against cloud-based storage services by showing off just how fast BitTorrent Sync can be. More specifically, the company conducted a test that shows Sync destroys Google Drive, Microsoft's OneDrive, and Dropbox. The company transferred a 1.36 GB MP4 video clip between two Apple MacBook Pros using two Apple Thunderbolt to Gigabit Ethernet Adapters, the site as a real-time clock, and the Internet connection at its headquarters (1 Gbps up/down)."

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