Hello.
I need help figuring out why there's such a difference in file size.
I have a bolt model created around SolidWorks version 12 and used in many assemblies. The file size is 1369 KB.
I rebuilt this model in version 22, and it's now 89 KB.

There are no differences in the build tree. What's causing the file size to be so large?

Display states have been removed.

How can I find out why the file is so large?

How can I reduce the file size without breaking the assembly's mates during the conversions?