I just rejected a tag edit for "volume". Obviously this term is ambigeous so the tag should get a description now but a look at the questions with this tag showed me that most questions use it in the sense of
filesystem volume, not in the sense of
Thus I suggest to use it for filesystems.
Of course, there should be an additional tag for sound volume. But as I am not a native speaker I do not create that myself now but ask more qualified people to make suggestions.