Abstract: A high density linear storage system comprising at least one storage unit mounted to a base frame assembly. The at least one storage unit may include a plurality of shelves or storage compartments for storing files, books, computer printouts and the like. A handle is mounted on an end of the at least one storage unit to facilitate the extension and retraction of the unit. The base frame assembly includes a stationary base frame and a movable carriage. The carriage further comprises a primary frame and an intermediate frame, which telescopically nest within the base frame when in a fully retracted position. Rollers are attached to the frame members of the intermediate frame and are configured to slidably engage channel members of the base frame and the primary frame. Retaining clips are provided to prevent extension of the primary and intermediate frames beyond a predetermined distance. A locking mechanism prevents the extension of more than one storage unit at a time.