Yeah, used to play around with this on my Jolla 1. I've also compiled similar FUSE-based support for NTRFS (ntrfs-3g) if you need that too (for a USB key over USB OTG ?) Warning for any USAmerican that comes in a future where Sailfish X is extended outside of Europe : The above pieces of code (exFAT FUSE drivers) are completely illegal in your country, because of stupid software patent laws in your country. Sorry for you. Talk to your representatives.