EX-4 Volume 1 above 95%

I have a red status light and a message displayed as " Volume 1 above 95% ". How can you figure out what folders are on Volume 1 and Volume 2 ? I have Vol-1 = RAD-1 with 4 TB and Vol-2 = Rad-1 with 4 TB. My dashboard indicates I have 2 TB free.