We are setting up an environment that is going to do an archive of a 20 TB flat file on a virtual tapes that belong to a cdl720. From what I am able to determine is this actually going to use 20TB's every day or will it just archive the new 500GBs that come in everyday? I am really hoping that it will only archive the new 500Gbs daily because they want this archived for seven years and that is going to eat up a lot of space.