Many offices obtain lists of constituents from outside sources, for example voter, lists. In the typical case, the office will record activities with only a fraction of the constituents in the database. When an updated list becomes available, it may make sense to purge all constituents for whom one does not have any office-generated information. The manage storage screen is designed to accommodate this kind of update cycle. In addition, it supports the purging of staging files for uploads which are just duplicative once the upload has been verified.