Hi Amy,
If you are using Cognos Analytics v12.1.1 (edited: it is working since v12.0.2), you need to do the following (it might be a partial answer, I hope it helps anyway):
You first need to login as a System Administrator.
Go to Manage, click on People then Stored data.
You can view either User view or Storage view:

More information: Managing stored data - IBM Documentation
Best regards,
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Patrick Neveu
BSL Consulting
IBM Champion
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