When linking worksharing enabled models, the creation of a backup folder is no longer required.
Previously when a worksharing enabled model was linked a _backup folder was created on the local computer. To speed the linking process and the opening of models with linked files, the creation of this folder is no longer required. This enhancement also supports workflows using Desktop Connector when you have limited permissions.
This enhancement can be disabled in the Revit.ini to restore the previous behavior. For additional information, see Backup Settings in Revit.ini.