- Prepare a flash drive of ≤32GB
- Format it as FAT32
- Put the decompressed img file into the flash drive
- Using the data cable, connect the A2A (Type-C) and the charger
- Turn on the power of A2A
- Insert the USB flash drive (USB port of A2A)
- Red and green flash alternately to indicate that the upgrade is in progress
- Video acceleration in progress
- Until the red light is always on, wait for another 1 minute, upgrade is complete

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