The ornamental design for a mediastoragecontainer, as shown and described.
FIG. 1 is a top plan view of a media storage container showing my new design, the broken lines showing the case and a disc being shown to illustrate the portions of the design that form no part of the claim;
FIG. 2 is an enlarged cross sectional view taken on line 2—2 of FIG. 1, with the disc being removed; and
FIG. 3 is an enlarged cross section view taken on line 3—3 of FIG. 1. It is shown broken away to conveniently illustrate the details on one page.
The portions of the article depicted in broken lines, whether or not cross hatched for sectional viewing, form no part of the claimed design.