TWRP shows "Unable to mount storage." Solution: Go to Wipe > Format Data (type "yes"). This fixes internal storage encryption from the stock ROM.
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 samsung galaxy tab 3 gtp5210 better
The tablet bootloops after installing a ROM. Solution: Boot back into TWRP. Perform Wipe > Factory Reset again. Custom ROMs often conflict with residual stock data. Conclusion: Don't Retire It – Revive It The Samsung Galaxy Tab 3 SM-T5210 is ancient hardware, but it is not e-waste yet. By replacing the crippled stock recovery with TWRP , you transform a laggy, app-incompatible tablet into a customizable, fast, and flexible machine. TWRP shows "Unable to mount storage