1. A network storage system comprising: a modular drive bay having a plurality of separately addressable drive ports; a plurality of removable drives operable to be inserted into the drive ports, each removable drive comprising memory operable to store archival data and a connector configured to form a connection with one of the drive ports to communicate with the memory, wherein the memory stores the archival data from one or more of a plurality of application servers; and an archival management system configured to manage the network storage system as multiple, independent file systems for the application servers, wherein one or more application layer partitions are associated with the drive ports; wherein each application layer partition stores a set of the archival data that relates to one or more of the application servers, such that the set of archival data stored in each application layer partition has a same set of controls and different sets of the archival data stored in different application layer partitions have different sets of controls, the different sets of controls including different immutability requirements and retention periods for different types of data.