1-liner bash to rename spaces in filenames or folder names

Source: https://stackoverflow.com/questions/2709458/how-to-replace-spaces-in-file-names-using-a-bash-script
#non-recursive method

for f in *\ *; do mv "$f" "${f// /_}"; done

HDD clean up; Does it spark joy?

size:gigantic
in Windows Explorer to look for > 128 Mb sized files