High density storage assembly

A high-density storage assembly, comprising a casing, an engaging mechanism, and a recording medium machine, characterized in that:

• the casing has a receiving space, with a plurality of fixing portions disposed on a substrate at a bottom of the casing, wherein the engaging mechanism comprises at least two supporting portions arranged in a side by side in a transverse width direction, each comprising a coupling portion and a supporting plate, with the coupling portions connected to the fixing portions of the substrate of the casing, respectively, and extended upward and obliquely to form the supporting plates, wherein a containing space for movably placing and positioning the recording medium machine is formed between an abutting leaf spring and a limit plate which are disposed on a lower surface of the supporting plate of one of two adjacent said supporting portions and an upper surface of the supporting plate of another said supporting portion, respectively, wherein the abutting leaf spring and the limit plate abut against the recording medium machine, with the abutting leaf spring being a resilient structure.