Directly installing TWRP from using the "Apply update from SD card" option is generally not possible because stock recovery 3e only accepts files digitally signed by the manufacturer. Attempting to flash a custom TWRP .zip usually results in a "Signature verification failed" error.
I can provide the specific button combinations and download links for your exact hardware. android system recovery 3e install twrp
adb reboot bootloader
fastboot flash recovery twrp_filename.img Directly installing TWRP from using the "Apply update
He rebooted the tablet back into . This time, instead of browsing internal storage, he navigated to "Apply update from ADB." instead of browsing internal storage
is the stock recovery environment that shipped with many Android devices running older versions (typically Android 2.3 Gingerbread through Android 4.4 KitKat). The "3e" denotes a version that includes basic signature verification.