Found GigaDevice flash chip "GD25Q64(B)" (8192 kB, SPI) on ch341a_spi.

Reading old flash chip contents... done.

Erasing and writing flash chip... Erase/write done.

Verifying flash... FAILED at 0x00004500! Expected=0x45, Found=0xff, failed byte count from 0x00000000-0x007fffff: 0x156b2

Your flash chip is in an unknown state.