Same for me. I couldn’t find the network share for my Rock. Turned out that from 2020 onwards Microsoft decided to put SMB v1.0 off in Windows 10. I needed to turn it on again in the Windows features. I used this information (scroll down to the post from White_King): https://superuser.com/questions/347492/how-to-connect-to-an-smb-share #support : maybe add this information to your instructions regarding the missing codecs topic. Thanks!
Gabriel