@Natanox it depends on the OS, btrfs is great on Fedora and OpenSuse, OpenSuse being the best due to the integrated snapshots on updates. I've been using on Fedora for a couple of years without issue. I like ZFS, works great on BSD but personally found it a bit against the grain on Linux, but its getting there! If you're talking about a file/data drives as opposed to OS, defo go ZFS