@Kevin_Z Thanks for the confirmation. I look forward to hearing from you.

I have jsut seen this thread online: https://apple.stackexchange.com/questions/371895/no-connection-to-network-drive-macos-10-15-catalina Is NetBIOS used by the C3150 for authentication?

@Kevin_Z Hardware and firmware versions listed at start of post, what else is required? The MAC error is simply one of - There was a problem connecting to the server "archer_c3150". Check server name...

I access the USB attached storage on the C3150 from Mac (wifi connnection) and PCs (wired LAN and wifi); prior to upgrading to MacOS Catalina I had no problems. Now, the Mac won't recognise the...