About organizing reports
You should determine whether you want your Vault reports to group media by robot, by vault, or by profile. Your decision affects how you use your volume groups and volume pools.
Vault searches the off-site volume group for the media to include in the reports. It also uses the off-site volume pools for the same purpose. Therefore, you can use either the off-site volume group or the off-site volume pool(s) to organize media for each robot, vault, or profile.