I discovered that a Windows 10 update removed the ability of my PC to find or connect to my NAS Drives as I hadn't used it to connect to then after a period of time. This was done to stop security issues due to vulnerabilities in the SMBv1 code which allows these links or Shared Drive connections to function. However, I do not have or allow remote access to my network, so I'm not concerned about this. There is an update to SMBv2 I believe, but this solution was the quickest. I was puzzling over how to get the SMB code back onto my PC and I only found out about this method when I rang a friend who runs an IT company and he said "its simple do this".
So open Control Panel, select Programs, then under Programs & Features Click on Turn Windows features on and off
This opens the Turn Windows Features on or off menu
Then Scroll down through the list until you find SMB 1.0/CIFS File Sharing Support.
Then Click on the square by the + sign, then Click on the + sign to open up the option.
The Click on the square with the Tick in it marked SMB 1.0/CIFS Automatic Removal to remove the Tick - this stops Windows from deleting the option if you don't connect via your PC to the NAS for 15 days (if I remember correctly from a blog I found?).
So open Control Panel, select Programs, then under Programs & Features Click on Turn Windows features on and off
This opens the Turn Windows Features on or off menu
Then Scroll down through the list until you find SMB 1.0/CIFS File Sharing Support.
Then Click on the square by the + sign, then Click on the + sign to open up the option.
The Click on the square with the Tick in it marked SMB 1.0/CIFS Automatic Removal to remove the Tick - this stops Windows from deleting the option if you don't connect via your PC to the NAS for 15 days (if I remember correctly from a blog I found?).