Error code

Windows ERROR_NOT_READY

WINDOWSERROR_NOT_READY
System Error Code· A POSIX/system errno returned when a system call fails.

What it means

The device is not ready..

How to fix it

  1. Insert media into the drive and wait for it to be recognized.
  2. reconnect the removable or external device.
  3. check cabling and power for external drives.
  4. verify the device appears and is online in Device Manager.

Not affiliated with Windows. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.