Part #2 How to wipe and format your Android 4.4.2 KitKat device using TWRP

The correct wiping and and formatting 

Did you do a backup? If not, please check THIS first.

You can get a flashable Version of TWRP 2.6.3.0-12 for TF101 from here. BUT! The author says, that there is some kind of a bug - which should not be concerning for most users but...Just saying... I couldn't find a bug but read the next paragraph. If you are unsure you may ask in the according thread at xda-developers.com : LINK.