If you're unable to read it in Master, Cable Select or Slave mode, with your external USB connector, then it may be mechanically broken, as previously stated.

I've heard Fields ~ https://www.fields-data-recovery.com/ is a quality data recovery specialist, for what it's worth.

Also... just incase it is the power connector, have you tried connecting with legacy power input?

- Tony
Ohio Data LLC
Phone systems, data networks, firewalls and servers in Central Ohio.
Some people aren't used to an environment where excellence is expected.