I have been using solidworks for some years now, but am working ona  project that is a little cumbersome in part qty's. I have inserted quite a few parts inthis assembly, and it seems every time I do so it wants to save the latest part, and it's subs. They have not been modified, just inserted into the assy model, I haven't even mated them.

I have not created these parts.

Why is this doing this?

Thoughts?