I recently completed an upgrade (db attach) from SharePoint 2010 to SharePoint 2013 to SharePoint 2016. Users now see a "Documents" folder and "Shared Documents" folder under Subsites - Site Contents. I have a user who uses Windows Explorer to manage SharePoint content who noticed more files under "Documents" folder than under "Shared Documents" folder. I assume "Documents" folder is the SharePoint 2016 replacement for "Shared Documents."
Why are there two folders?
Should these folders be mirrored?
Can "Shared Documents" be deleted?
What is best practice for this scenario?