BIGTREETECH CB2 - Erasing Emmc; Using Rkdevtool to Erase Emmc (Windows); Erasing Emmc after Booting from Microsd Card

BIGTREETECH CB2 User Manual
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4.4. Erasing eMMC
When using a MicroSD card as the system card instead, it's best to erase the data on
the eMMC to prevent the motherboard from booting from it by mistake.
4.4.1. Using RKDevTool to Erase eMMC (Windows)
1. Refer to the steps in "4.3.1 Using RKDevTool to Write the eMMC (Windows)" to
connect the motherboard to the computer.
2. Open the "RKDevTool".
①Find the path where the downloaded RKDevTool is located.
②Open the RKDevTool.
③The software will recognize a "LOADER" device. If it recognizes "MASKROOM,"
it indicates there is no data in the eMMC, hence no erase operation is necessary.
④Click "Advanced Function."
⑤Click "EraseAll" to begin erasing data from the eMMC.
⑥"Erasing sectors success" indicates the erasure is complete.
4.4.2. Erasing eMMC After Booting from MicroSD Card
1. Refer to the steps in "4.3.2 Writing System onto eMMC Using a MicroSD Card"
and log into the system terminal.
2. Run the command sudo mkfs /dev/mmcblk1 and then enter "y" to confirm.