Without going into too much detail.
- Main pack files are located where your game is installed, typically named "ClientFullBuild0.package" per pack. You open these with Sims4Studio and browse the files list in the Warehouse tab (if not displayed by default).
- On that list, you find Clip Headers (ideally) with sorting by type, so select them all and export them to a folder. Every file will export with the name of the clip in it thanks to Sims4Studio automatically displaying it.
- Once you have all of the Clip Header files exported, specifically on Windows, you select them all and shift+right click to copy their paths.
- After paths are copied, open a text editor that supports recording macros (like Notepad++ or Sublime Text) and paste the paths in. You make a macro that cleans up each line to only contain the name. Then you sort cleaned named and you're done. I don't want to go into explaining what macros are or how to use them, that's a whole another topic, so I would recommend reading the documentation of the given text editor.
Once you're comfortable with each step doing this is very fast.
