[CentOS] SSD no longer detected - slightly off topic

Hi All,

I have a new Samsung SSD 2T 860 type device. I connected it to my centos 7.6 system using external USB 3.1 that has power and data supplied over the USB cable. I do this all the time with a 120G SSD works fine.

Formatting the device worked fine - then I mounted it and tried to copy 1.5T of data. The copy never finished through the night. I think there wasn't enough power for the SSD....

Now when I power the SSD with an external USB with power the disk is not seen when I plug it in.

Any thoughts how to get the device to be seen under external USB power so I can reformat and get it going?

Thanks,

Jerry