Yeah, it was quite dramatic, but I made now a second backup, and as you mentioned, I might have to reformat the USB. Thank you.
Ok, I got it to work by restoring the header. Phew, that was dramatic :-)
I have one USB stick which is encrypted with VeraCrypt. This morning I was getting an error, "The disk you inserted was not readable by this computer", on all computers. I have some very important data on this USB and I really have to be able to recover my files. Im on Mac, what would be the best way to fix this? Thank you in advance.