What is the physical structure of your new home's network?
Line diagram where ----> represents an Ethernet cable.
ISP === (coax, fiber, DSL) ===> Modem ----> [WAN port] Router [LAN port] ----> D-Link 1008 -----> PC and ----> EX4100 .
With other wired and wireless ( ~~~~> ) devices connected via the router and switch as applicable. Modem and Router could be combined.
Make and model information for modem and router?
Feel free to edit and correct my line diagram as necessary.
Does the home have a patch panel and wall jacks for network connections?
Key, in addition to the above suggestions, is to simplify the connectivity as much as possible to get the NAS onto the network. Bypassing the switch, wall jacks, etc...
For example a direct NAS Ethernet connection to the router via a known working, at speed, Ethernet cable.
Objective being to verify that that each involved physical connection along the path is working.
Prove that the NAS is properly configured and connecting to the network via a direct router connection, Then you can progressively move the NAS to its' intended location. If the NAS loses connectivity then you will know where the problem resides.