That did it! (I found out about Victoria SSD/HDD earlier today)

Doing a full scan with Victoria it found just 13 bad sectors, that was enough to make Veeam fail surprisingly. Dunno why chkdsk couldn’t find them.

It was a bit finicky getting Victoria to remap the sectors on Windows 11 and on a SSD, but I eventually got it. Then I ran chkdsk again and it said it found an error and “fixed the filesystem.”

Now I just ran Veeam again and it finally succeeded :)

Nope it’s a Sabrent nvme