Jim Dee's Archiving Utility (Tip #2059) creates a folder named Archive in each drawing folder. When you archive a drawing, the current state of the drawing is saved in the Archive folder using the drawing name plus the current time and date. You can retrieve the archived drawings at a later time for reference or to start a different part of the design from a template. This well-written utility demonstrates how to manipulate files in Visual LISP. To use, load the LSP code and type ArchiveDWG at the Command line. The rest is automatic.