Staging Space In Use shows the total size (in bytes) of the files and folders currently in the staging folder used by the ...

Staging Space In Use shows the total size (in bytes) of the files and folders currently in the staging folder used by the DFS Replication service. This counter will fluctuate as staging space is reclaimed. The DFS Replication service stages files and folders in the staging folder before they are replicated, and automatically cleans up the staging folder when it exceeds a pre-configured threshold of the quota.