Here's info on my phone and what I've done so far:
1) hboot v1.56
2) got unlock token from htcdev and unlocked successfully
3) flashed TWRP 22.214.171.124 recovery using Squabbi's HTC One Toolkit.
4) tried to install supersu using the toolkit and then tried putting supersu.zip on the sdcard manually. Neither worked and resulted in lots of error messages in TWRP.
4) tried to wipe data and everything else but this failed too.
Attached in this e-mail is a screenshot of the error messages i get in twrp when trying to wipe. Any ideas on what I can do to fix the internal storage so I can actually root my htc one?