Drive may have failed --- will be difficult even to test it if it can't be detected, but try SeaTools for Windows:
https://www.seagate.com/gb/en/support/downloads/seatools/
Drive may have failed --- will be difficult even to test it if it can't be detected, but try SeaTools for Windows:
https://www.seagate.com/gb/en/support/downloads/seatools/