The ornamental design for a coveredstoragecontainer, substantially as shown and described.
FIG. 1 is an isometric view of a covered storage container, with the cover partially raised from the top, showing my new design; the right and left sides of the covered storage container are identical in appearance.
FIG. 2 is a rear view thereof.
FIG. 3 is an isometric view of an alternate embodiment of the invention of FIG. 1, showing the rear as a transparent material; and,
FIG. 4 is a rear view thereof.
The broken lines in the drawings illustrate stitching and form part of the claimed design.