The Samsung SSD has just died
Yikes! That didn't last long.
Mine is still going fine, as far as I can tell.
Yeah. I'm a bit pissed off with that.
This is being sent to you from the new machine.
ETA. I've just taken the original spinny drive out of the 2015 machine as it isn't going to re-cycling with that in it.
I thought I'd give the SSD a try in the new machine.
The new machine could see the SSD (the 2015 machine couldn't) and asked if I wanted to back up from the SSD.
I unplugged the SSD from the new machine.
I plugged the SSD back into the new machine.
It could still see the SSD, but there was no invitation to back up from it.
I looked inside the SSD.
It was empty.
Make of that what you will.