) introduced better support for storage encryption and updated backup engines, which are essential if you are moving from the stock Android 4.4.2 to more modern custom ROMs. Are you planning to install a specific custom ROM like LineageOS after flashing this recovery?

: Connect the tablet to your PC via USB. Odin should show a blue or yellow light in the : In Odin, click the ) button and select the t310.twrp.3.1.0-1.tar.md5 : (Critical) Ensure only "F. Reset Time" is checked. Many experts recommend unchecking "Auto Reboot"

After first boot into TWRP, allow it to modify the system partition (swipe to allow). Then, immediately flash no-verity-opt-encrypt.zip if you plan to stay unencrypted.