Man of Honour
In Solid you can add cloud, FTP etc from the 3 dot menu > Storage Manager. Be sure that your LAN SMB credentials are set up right as you will need to enter user/pass to access the network shares from a LAN machine. Since the update to support SMB2 it's worth noting that connecting to a LAN share Windows PC may take longer than usual. I typically see 10s times before the contents show up but thereafter the connection is instant. If you map the root of a drive then you will get the drive's storage usage too in the menu as shown in my screenshot.
To add any storage sub location as a bookmark, when you are in that folder just go up one level then long press that folder and add to bookmarks. It will then be manageable from the Bookmarks area like in my screenshot.
To add any storage sub location as a bookmark, when you are in that folder just go up one level then long press that folder and add to bookmarks. It will then be manageable from the Bookmarks area like in my screenshot.