A storage magazine for data cartridges includes a plurality of storage slots located side-by-side and potentially above one another. The storage slots are defined by parting walls disposed at spaced intervals between top and bottom surfaces of the storage magazine. The parting walls include a stop rib at the back end and a latch mechanism integrated into the wall of the parting wall. The latch mechanism includes a pivot member extending across an opening in the parting wall and first and second arms extending in substantially opposite directions from one another. On of the arms is a latch arm to engage a recess in a side wall of the data cartridges and the other of the arms is a release arm for pivoting movement to move the latch arm from the recess in the data cartridge. A foot extends perpendicularly from the major planer surfaces of the parting wall providing a mounting base for stabilizing the parting wall between the top and bottom plates and supporting the cartridge in the correct position for engagement.