Disclosed herein is an apparatus for supporting discs. The apparatus includes an elongated member. The elongated member includes an exterior surface having grooves spaced apart from each other along a length of the elongated member. Each one of the grooves is configured to receive a portion of a corresponding one of the discs. The elongated member includes an interior channel extending along the length of the elongated member. The elongated member includes fluid release portions spaced apart from each other along the length of the elongated member and each having at least one opening extending from the interior channel to the exterior surface. Each one of the grooves is interposed between corresponding adjacent ones of the fluid release portions.

A non-metallic media substrate includes a disc-shaped substrate body having at least one media storage surface on a face thereof. The substrate body has a center opening having an inner diameter and an outer diameter surface, and the substrate body has a thickness. The substrate further includes an annular groove at the outer diameter of the media substrate, the annular groove having chamfered edges and an internal concavity extending toward the inner diameter.