Open Odin as an administrator and connect your tablet via USB. A "COM" port indicator in Odin will light up when the connection is successful.
Power off the tablet. Press and hold Power + Home + Volume Down simultaneously. When a warning screen appears, press Volume Up to enter Download Mode. Samsung SM-T210 Firmware
Obtain the correct .tar.md5 firmware file specifically for the model. Open Odin as an administrator and connect your
Download the Odin 3 tool and install the latest Samsung USB Drivers on a Windows computer. Firmware Flashing Guide (Odin Method) Samsung SM-T210 Firmware
Your tablet should be charged to at least 70-80% to prevent it from powering off during the flash.