In plain words
A folder is an organizing container inside the file system.
Why learners confuse it
Because folders can feel like places, people sometimes start treating them like physical devices. They are really part of the file map.
A folder is a container that helps organize files and other folders.
If people confuse folders with files or storage devices, path and navigation lessons become much harder.
A folder groups files and sometimes more folders so the file system stays organized.
A folder is a container that helps keep saved things together.
A folder is an organizing container inside the file system.
Because folders can feel like places, people sometimes start treating them like physical devices. They are really part of the file map.
Study the larger concept after the word itself becomes clear.