I found an answer that fixed my issues with Th2 release and also the insider builds that
stopped me seeing my NAS, and 2 other external network drives in Explorer.
This is what I did and it fixed the issue:
You will need to reboot the machine and remember to back up your install (preferably with Macrium)
Can't see NAS drives in your network on Windows 10? Here is the solution:
1/ run cmd as admin
2/ sc.exe config lanmanworkstation depend= bowser/mrxsmb10/nsi
3/ sc.exe config mrxsmb20 start= disabled
Restart and you are done!
before you start, just in case. I hope it helps you.