The distro is usually not really the problem, the desktop environment usually takes up a decent amount of disk space and snap/appimage/flatpak packages compared to native packages from your package manager. At least when strictly speaking about the system and programs, personal data (videos, Images, music,...) is still the biggest storage hog. I don't think there is a good option, you could ofc shrink your windows partition and grow your Linux partition or just buy more storage, storage is really cheap these days. Additionally you can regularly clean up your system, delete the saved logs, delete unneeded files and uninstall unused packages/programs.

I would recommend Peropesis to you as a minimalsitc distro but the dual booting process will not be as easy as mint you also can try to use a distro with xfce desktop environment but I would say that 30 GB aren't much anymore and you should think about upgrading

Ubuntu

Ubuntu