Just succeeded in encrypting my FP2 with open OS. Up to now TWRP worked fine without encryption. After encryption I can boot to TWRP. But TWRP informs now:
“Unmodified System Partition
TWRP can leave your system partition unmodified to make it easier…”
If i press “Keep Read only” i get during back-up info that back up failed.
Now my question:
Is it still not possible to back-up encrypted partitions with TWRP or is it neccessary to allow the modification of TWRP instead of “Keep Read only”?
If TWRP does not back-up, there is also the question what to use TWRP for?