Disclosed is a two rack unit chassis and low profile tool-less hard disk drive carrier (HDD). The two rack chassis including a plurality of HDD bays and a backplane including a plurality of connectors corresponding to the plurality of bays, each bay configured to receive a low profile tool-less carrier. The low profile tool-less carriers each comprising a first latch configured to release a sidewall of the low profile tool-less carrier and receive an HDD, a second latch configured to release a lever having at least one protraction at an inward end, and the lever configured to couple the at least one protrusion of the low profile tool-less carrier to the connector of the corresponding bay to which the low profile tool-less carrier is inserted.