Disable Encryption after Factory reset on Android 6.0 (Marshmallow) Is there any method to disable encryption after A factory reset on Android 6.0?

Regards
For me (Lenovo P2, Android 8.1/LineageOS 15.1) the TWRP procedure below worked although with one side effect. It may also work on Android 6.

Please note that it requires an unlocked bootloader, a custom recovery image (standard for custom ROMs), blanks the /data and internal /sdcard partitions and involves rooting - note that this may result in problems with some security-sensitive programs, such as banking/payment apps.

It is essentially this one for a different device, apart from the steps to mount storage and using a different zip (important); the screenshots are instructive. It is worth being familiar with the recovery program.


Backup /data partition, including the USB mounted internal storage (which I think is /sdcard on my phone). I would also recommend syncing contacts, backing up WhatsApp to cloud ..etc. Back up the entire phone flash memory if you are not using a custom ROM/recovery.


I would advise studying/reading up a bit on this - I somehow failed to do /data properly, so had to reinstall and reconfigure all apps.


Download the Magisk zip on this page or a newer one if you can find it (it may be possible to update it with newer Magisk files; or you can flash a newer Magisk version after rebooting the system and confirming the /data partition is unencrypted).
Reboot into recovery (TWRP).
Format the /data partition (for TWRP use the specific Format Data button under Wipe - see screenshot on first linked page).
For TWRP reboot into recovery again so it definitely understands the /data partition is now no longer encrypted.
Mount /data &amp; /sdcard and move the Magisk zip to the sdcard area.
Install the Magisk zip.
Reboot System.
Open Magisk Manager under the apps and configure Magisk Hide for any relevant apps. Magisk Hide settings may not survive a reboot on some filesystem implementations - worth checking as if you are blanking /data, that is also a good time to change filesystem on it if you want those settings persisted!


Side effect on Lenovo P2 is that the fingerprint sensor and settings do not work. (If I encrypt the data partition later from within the Android settings, then it works again.)