I forgot earlier -
This command shows you the shares that are available on the server machine.
C: \Users\MyFileServer>net share
Share name Resource Remark
-------------------------------------------------------------------------------
C$ C: \ Default share
IPC$ Remote IPC
ADMIN$ C: \WINDOWS Remote Admin
The command completed successfully.
IPC$ and ADMIN$ are not file shares but something else.
It is possible to create shares with net share but you may as well use the GUI in Windows Explorer (was File Manager) since that works OK.