In TWRP 3.5.0_10-beta1 I can mount the system partition but not wipe or backup (its not shown in menu).
I'm currently using MIUI 21.1.2.0 global and want to install a custom ROM but want to backup everything before.
Is this due to the super partition containing system and others?
Is is safe to backup/restore/whipe the super partition in order to install a custom rom?