Yes its hard to find info about that issue and I spent a lot of time googling to find out more; its buried in Windows support here but doesn't actually mention Windows 10 and I found that it worked...

If its an external drive ( a network attached storage drive) , then the problem most likely is that with Windows 10, it is unable to 'see' samba devices in the local network. Windows 10 seems to...

Perfect....thanks so much. The fix worked exactly as you described.