If you'd like to move forward with or installing a Custom ROM after flashing TWRP:

Enable (if the option is visible on your firmware). 2. Enter Download Mode Power off the tablet completely. Press and hold Volume Down + Home + Power simultaneously. When a warning screen appears, press Volume Up to continue. 3. Flash via Odin Open Odin.exe on your PC.

: Once in TWRP, you can flash Magisk to gain root access.

TWRP 3.0.2-1 SMT-560 TAR verified is a specific version of the TWRP recovery software that is designed for Samsung devices, particularly those with the model number SMT-560. The "TAR verified" part refers to the file format and verification process used to ensure the integrity of the software.

Since you disabled auto-reboot, your tablet is still in Download Mode. Hold Volume Down + Home + Power to exit Download Mode, but the moment the screen goes black, immediately switch to Volume Up + Home + Power .

Hit the "Start" button. Once it says "PASS!", unplug the tablet.

: The container. A Unix archive format utilized by Samsung's flashing software (Odin). It is the payload, the concentrated dose of freedom packed tightly into a single file.