content: I used to use a P2P backup system where a few friends and family could swap HD space with each other for backup.  It was great, but the company is ending their consumer support.  Do you know of any similar solutions?  I want off-site backup and encryption of those files without having to pay an arm and a leg for a couple hundred gigs of space. Edit: A quick search turned up this program called "BuddyBackup".  The concept is interesting but there's so many red flags... No updates/blog posts since 2013, no remarks on how its monetized , forum is taken over by spam bots.  The program sounds too good to be true (except not being open source) and if they don't disclose how they make their money... It probably is.