If you download as a disk image, it is using btrfs file systems. I've never been fond of them because of stability issues but I thought well, it's been a few years since I last played with them maybe has improved. Well, my instance lasted about two weeks before it ate it's file system. The other thing I did not like is that it was setup for a standard BIOS and would not boot on a UEFI system, so for both of these reasons I decided instead to start with a Debian Bullet virtual machine and install freedom box on it, but after doing so it rendered the networking totally non-functional, so now I'm trying to troubleshoot that.