There are two levels of deletion in SourceOffSite: Delete and Destroy. If a file is shared across two projects, the Delete and Destroy Permanently commands will only remove the file from within the currently selected project.
The Delete command is recoverable as the files will still exist within SourceSafe.
To delete files or projects in SourceOffSite, select the files or projects from the Project List or File List to be removed. Then, click Delete or choose Delete from either the File menu or by right-clicking the selected items.
When the Destroy Permanently option is selected from the Delete dialog, the files are unrecoverable. When this option is selected, clicking OK will remove and delete files from the file list and the SourceSafe database. This will free up disk space.