Never know what’s going to happen with a beta software. If you play around with MacOS, I upgraded to Beta 6 Big Sur and it somehow seems to have disconnected my network storage. Had to reload NAS drive. A nuisance.
Yes, for some reason Beta 6 messed up network file shares / SMB.
To fix, run this command in Terminal:
sudo kextload /System/Library/Extensions/smbfs.kext
I’m sure it will be fixed in Beta 7, as it got a lot of noise in the forums.