Hi!
I also have a similar situation. There is a shared HDD (windows 10, everyone writes and reads) that I can not access.
I will enter the ip address but will not connect. If samba min/max1 works, but only if the user account is password protected.
If I edit the /storage/.kodi/userdata/sources.xml file, it only works with min/max 1. And of course with a password.
Here is a log here:
http://ix.io/1ls6
Thank you for your help.