open with explorer
Allow the old feature "Open With Explorer" in OneDrive for Business and Office 365 Group Files on the web.
Syncing files through OneDrivefor Business app is not a good solution for many businesses.
This can be done but its called "View in File Explorer" and available from the view menu drop down list. If you are looking for a permanent drive mapping solution you could try Zee Drive (a commercial tool) to map SharePoint Online team sites and OneDrive for Business as a network drive http://www.thinkscape.com/Map-Network-Drives-To-Office-365-OneDrive/
I support this; I miss the feature