Uh, all your .ds files were for D|S2.  Those are the MAT files specifically for Daz.  .dsa is D|S3.

Your geometry.dso files are for your saved .daz files.  If you delete them, you won't be able to open your saved scenes.

The others, I don't know, but I would venture to guess they are as important as the ones you've already deleted.