Finder not displaying all NAS external hard drive folders and files
iMac Retina 5k, 27-inch, 2017 (4.2 GHz Quad-Core Intel Core i7, 64 GB 2400 MHz DDr4)
MacOS Ventura (version 13.6.1)
WD My Cloud EX2 Ultra NAS (version 5.27.157)
WD 12 TB external hard drive (connected to NAS) (exFat)
MacOS Finder displays all internal NAS hard drive folders/files. MacOS Finder no longer displays current NAS external hard drive contents. The majority of folders appear to be visible but the overwhelming majority of the files are missing. MacOS Finder is also displaying a previous folder that no longer exists.
I have rebooted the iMAC and NAS, removed and remounted the external hard drive, reset the PRAM and refreshed Finder... numerous times. iPad/iPhone Files app displays all folders/files correctly as does the NAS app (WD My Cloud OS5). The files exist but aren't available through MacOS Finder. Up until about a week ago, this was not an issue.
iMac 27″ 5K, macOS 13.6