Jolla should (and it not only should, it sure does) automount the card if set up correctly. Without seeing any logs I cannot have a guess why your system does not automount One way to force it to automount is to set an entry to /etc/fstab for it. However it should also work without. No idea why it does not work for you. No difference, and no reason to repartition/remount it. One thing comes to mind, I do not remember if you had another (smaller)SD card? if so, does that automount correctly? If you have, and it does, you could take logs from each case and compare those for differences.