Hey guys here are some useful command’s that can free your space and remove unwanted files
Main ones>
sudo pacman -Sc
sudo pacman -Qdt
sudo journalctl --vacuum-size=500M && sudo journalctl --vacuum-time=7d
Additional cleaning >
Remove all uninstalled packages
sudo paccache -rvuk0
Remove old installed packages, leave 3
sudo paccache -rvk3
Clean yay cache
yay -Sc -a
Something for pamac GUI package manager>
Clean pamac build cache
pamac clean -bv
Remove orphaned libraries
pamac remove --orphans
clean cache
pamac clean --build-files
Also I suggest to use additionally GUI application
Bleachbit > https://www.bleachbit.org/
To install it >
sudo pacman -S bleachbit