I've been trying to copy an old archive folder containing 138,761 items from about 1996-2011. The copying stopped with an .sit file it didn't like ("the filename is either too long or .. something else"), and because there was no option to skip, well, I'm stuck with an incomplete copy with inaccessible files.
On advice here, I used an alias to locate the problem file (not made so easy either when OS doesn't copy sequentially any more), and unarchived to view, then deleted it.
Attempting to restart the copy I was given an option to merge, but the copy immediately failed "The operation can't be completed because an unexpected error occured (error code 0)" Guess that means I can't modify?
Meaning the copying workflow is completely useless in the case of a file that won't copy. 2024? Lame.