That last comment suggest perhaps a load issue with it’s internal power supply, if it has one or the drive motor could have a shorted winding in it basically putting a short across it’s power input from the USB port. Can you hear the unit spin? Does it run hot? If so I’d suggest you take it to a computer shop and see if they can retrieve your data. But let them know what it did to that port. You could measure across the power input pins with a DVM and measure the resistance but it would be nice to know what it should be. The shop would most likely use a known good unit and compare them and/or a current limited power supply to see what it draws in amps compaired to the units specs. Once thts done they still could have the means to retrive the files.
Good luck
