When I ran this command on my RPI: sudo echo deb http://debian.yeasoft.net/btsync wheezy main contrib non-free >> /etc/apt/sources.list.d/btsync.list ...I received this error message: bash: /etc/apt/sources.list.d/btsync.list: Permission denied However, I solved it by changing the command to sudo sh -c 'echo deb http://debian.yeasoft.net/btsync wheezy main contrib non-free >> /etc/apt/sources.list.d/btsync.list' Just to let you know. Someone may have already mentioned this, I haven't read the whole thread.
I share a collection of several thousand osu! beatmaps with a group of my friends. We initially used Dropbox, but had to switch to AeroFS when it exceeded 2 GB, and later to BTS when AeroFS went commercial. It's pretty handy, since the osu! website only allows a couple of downloads per hour. I'm also thinking of setting it up on my pie, in order to ditch Dropbox entirely.