MacOS directories incomplete

All those who contrbuted to this topic were very helpful. I simply want to provide some follow-up information.

After going through the learning curve (and pains) of moving my large directory (~2TB) out of an even larger existing one (~4.5TB), I successfully created it as a separate share.

Unfortunately, it did not solve the original problem. Occasionally I still get the problem where the directory listing (in Finder; all the computers connected on the LAN are Macs) populates with only a portion of the complete list of items. FYI, there are ~1450 directories and ~20000 items total. Then, after anywhere from 2 to 20 minutes, the rest of the items shows up. Sometimes I can create a new directory, go off to do another task for a minute or so, return to the listing and find the new directory is not there. When that happens the only solution is to wait several minutes until the complete directory listing happens.

Still, I have learned some new things about moving to a new share, deleting large amounts of data, etc. You have been helpful and I appreciate the assistance I received. Perhaps, a newer release of the OS will solve this annoying issue.