Lack Of Disk Space - What To Delete?

I recently downloaded TSW4. Now I can't open Steam anymore due to the lack of disk space. So my question: What may I safely delete?? I have enclosed 3 screens from the DLC-Folders of TSW2 und 3. May I delete all other folders of TSW2 and 3 without compromising TSW4?
Thank you.

 

TSW2 and TSW3 can be safely uninstalled in their entirety. TSW4 has its own copies of all DLC.

 

You can remove those, or keep TSW2 + GWE if you want to drive the HST in rain or snow (which is broken in TSW3 and 4).

I've kept TSW2020 + SPG + CSX GP40-2 and the old NEC Newark - New Rochelle if I want to play these again.

 

Thanks for the quick replies, people.