You now have to back up your USB drive before you try to recover anything. You can do this in Disk Drill. Go to Extra Tools, ...
TL;DR - every external HDD gets "the volume /dev/rdisk[X]s1 [with UUID etc] was found to be corrupt and needs to be repaired" (it doesn't repair it). Even though those disks were fully erased and ...
I suffered a power outage the other day and when I attempted to boot my main computer it would not go into Windows, only the BIOS. Further investigation revealed the Samsung Evo Pro 990 1TB M.2 SSD ...