Ensure the tablet has at least 50% battery to avoid shutdown during flashing. Step-by-Step Guide: Installing TWRP 3.0.2-1 on SM-T560
Android 6.0+ introduced forced encryption. TWRP 3021 can see the encryption but cannot decrypt it without a pattern/password. Fix: twrp3021smt560tar full
: Enable USB Debugging and OEM Unlock (if available) in the tablet's Developer Options. Ensure the tablet has at least 50% battery