Deleted Space in Use shows the total size (in bytes) of the deleted files and folders currently in the Conflict and Deleted ...

Deleted Space in Use shows the total size (in bytes) of the deleted files and folders currently in the Conflict and Deleted folder used by the DFS Replication service. The DFS Replication service detects remote deletes from its sending partner and moves the file or folder to the Conflict and Deleted folder. The service automatically cleans up the Conflict and Deleted folder when it exceeds a pre-configured threshold of the quota.