Working with a seriously sick external SSD used as part of the MacBook Pro’s backup strategy. Can’t even use DiskWarrior on it - it gets to the stage of constructing a replacement directory then triggers a kernel panic.
I tried four different start-up drives on two High Sierra Macs, same error each time. I’ve erased it & am now trying to re-clone it with SuperDuper! app.
Clone sucessful, booted the system OK.
Do not buy Kingston V-series SSDs. The reason they’re cheap is because they’re crap.