The Covenant storage device is a form of storage for Covenant information, similar to the UNSC's own Data crystal chips. The block consists of a brick shaped-chunk of a superdense material unknown to Humans. Its capacity is apparently unknown as well, but it is likely to be numeral.
- The Covenant Storage Device was thought to have held Cortana in it. After fighting through the level Floodgate, John-117 manages to retrieve it in the infected ship. Later, when the device is repaired by 343 Guilty Spark, it turns out to only contain a message from Cortana while she was inside High Charity.
- In Halo: Combat Evolved, these devices can be seen on the sides of some of the Covenant storage crates.