I had not been paying attention to all my 'conflicted copies' that were created by Dropbox... So many that - well - Windows Explorer could not modify or delete the files. They were all 255 characters in length but had "..." characters in the middle so windows took everything after the first "." as the extension.
I had to write a Java program to rename them to something shorter so I could then verify their contents with the correct app (password storage app).
Anyway - seems like Dropbox's file name truncation function when adding "Conflicting Copy" need to be looked at.
The file name (and ext) are 255 (per Java Path::getFileName) - this does not include the path (device/directory) - and 255 is the max for NTSF
Windows explorer - the Filename field - when stretched so it is all visible had something like "Confl..(Conflicted Copy.abcd" so Windows would say it was a file of type "(Conflicted Copy.abcd" and not know what to do with it.
I attempted to move all of these (there were 12 of them) into a new folder - Windows Explorer would not let me drag them - or "cut/paste" them.
What can I say - I'm a geek and I needed to cleanup these files 🙂