To manage Shadow Log records, use the shortcut menu available via a right mouse click on every record. The menu includes the following commands:

Unlike the service’s shadow log viewer, when you delete a record in the server’s viewer, the record’s binary data is removed from the database or from the disk (it depends upon the Store shadow files in the database flag) but all other information (such as the file name and size, user name, date/time, process and so on) is moved to the special log called Deleted Shadow Data Log.

This Deleted Shadow Data Log is used when you do not need the content of the shadow data anymore and you want to clean up storage (either SQL Server or the disk), but you need to keep information about the data transfer.