Download Autosave and try
Installation programs (for Windows) for download in an zip archive.
Last version (v. 1.1) – June 28 2009
Autosave now allows automatic taking of shadow copies. In this type of saving, users define a directory for shadow copies. At each set time interval Autosave saves your document and creates its copy so you still work with the original file but you already have its latest copy saved on the disc. The maximum number of shadow copies is 100, the same number as for the files with incremental save.
Autosave for Photoshop CS5.1
Autosave for Photoshop CS5
Autosave for Photoshop CS4
Autosave for Photoshop CS3
Autosave for Photoshop CS2
Autosave for Photoshop CS
Autosave for Photoshop 7