The plugin appears to be looking for mkfs.exfat in /usr/sbin/, but with 7.2+ it now exists in /sbin/. Creating a symlink resolves the issue, but the plugin should be updated to correct it. Jan 9 20:23:47 TheArchive unassigned.devices: Format failed: sh: line 1: /usr/sbin/mkfs.exfat: No such file or directory