The logon name you used on your PC is NOT recognized by the NAS, and
was converted to guest, with guest access rights. Ask the NAS Administra-
tor to create a user name for you. (Use the same name as on your PC.)
You do NOT have access permission for this share.
Ask the NAS Administrator to grant you access.
Note: Windows uses the Computer name, as shown on Control Panel - Net-
work - Identification, as the default Logon Name. But you can create a new
Windows logon name by merely entering a new name and password at the
Logon prompt.