Just a quick update to fix the exFAT issue on perm-flashed TWRP. I also did some additional device file cleanup, but that's just housekeeping.
If you have any issues, please post on the "Issues" tab along with a recovery log. Issues posted without a log will be ignored and closed immediately.
NOTE: Decryption will work on stock Oreo ONLY if TWRP is perm-flashed.