Hi All
My work laptop windows 10 64 but within my office LAN I was trying to map the work sharepoint folders and documents to my work laptop following the instructions in the link below :

Office 365 SharePoint Map Network Drive - Spiceworks
Using Internet Explorer and credential saved

Please see snapshots below :

Imgur: The magic of the Internet
Then I tried to mount the root folder which has many sub-folders and that failed as well :

Imgur: The magic of the Internet

Thx