I also 'share files' on my home computer network consisting of 2 desktops and 1 laptop currently running Windows 10 Pro version 1809. I was aware that Home Group was going away when I upgraded all 3 to version 1803. Windows Explorer no longer 'discovered'
my Windows 10 version 1803 desktop with all my ripped music files. It did 'discover' my brother laptop still running Windows 7, Samsung smart TV, etc.
I started looking for a work around to my problem and found one on Windows Central that was similar to Steven's which I successfully applied. I also ran into the access denied issue that was described here on this thread. I use the same windows admin account
and password on my three computers which never caused access problem before 1803 with Homegroup. I then signed on to my file sharing computer with my backup local windows admin account and was allowed access to the files with my windows account from my other
PC's
After upgrading to version 1809 I experienced the same issue with discovery of other Windows 10 PC's and shared files. I became aware of a 'new feature' in Windows 10 ( after a through review of all items in the 'Setting Menu's' ) which became available
in 1803 but wasn't really hilite'd enough by Microsoft or the press. Windows Settings/System/Shared Experience/Nearby Sharing using WiFi. Once turning on Nearby devices (my devices only) my sharing desktop PC and it's shared drive and folder became immediately
discoverable by my other PC's on my network.
This looks to be Microsoft's replacement for 'Homegroup'