Missing Folder
I have a stack of folders on my Synology NAS that I have been accessing for years via Finder (in Mojave, v10.14.6). Last week a folder containing my audiobooks disappeared. I have no idea why. I have neither done any updates nor made any changes. The folder is still on the NAS, in the same location, and with all its contents visible (seen via DS File, a Synology utility). I can still listen to the audiobooks via the Naim and Linn music apps and Minimserver (from my iPad), but there is no sign of them in Finder although all the other folders on the NAS are visible there. When I try to create a new folder with the same name and in the same location, Mojave doesn't let me as it says the folder already exists, which, of course, I know it does. So the Finder displays no folder existing but won't let me create it as it says it does exist. I have done all the usual searches via Spotlight for the folder and files it contains but they have all come up with nothing.
All help appreciated.
MacBook Pro Retina