what is a psa file within adobe photoshop album?

I'm working on this, but this is what I found so far:

The My Catalog.psa file contains information about images you import into Photoshop Album and the tags that you applied to those images. The My Catalog.psa file may become damaged if you import a file that has a corrupted modification date. Files with corrupted modified dates can appear in Windows Explorer as files with extremely old dates. When you try to import a file with a corrupted modification date into Photoshop Album 1.0, the import fails, and incorrect data is written to the My Catalog.psa file. If this file is damaged, Photoshop Album 1.0 won't start.

a psa file in photoshop is a photoshop album file. A software called Adobe Photoshop Album file.

YO can find more info in this web site.

http://filext.com/detaillist.php?extdetail=PSA