TWRP shows "Unable to mount storage." Solution: Go to Wipe > Format Data (type "yes"). This fixes internal storage encryption from the stock ROM.
This article explains why stock recovery holds you back, how TWRP revolutionizes the SM-T5210, and how to install it safely. Before we discuss why TWRP is better, we must understand the enemy: Samsung’s stock recovery. twrp samsung galaxy tab 3 gtp5210 better
The Legacy Device That Refuses to Die
Touchscreen doesn't work in TWRP. Solution: This happens on very old TWRP builds. Update to the latest version (3.3.1 or higher for santos10wifi). TWRP shows "Unable to mount storage