The ornamental design for a decoration of storagecabinet, as shown and described.
FIG. 1 is a perspective view of a decoration of storage cabinet, showing my new design;
FIG. 2 is a front view of the decoration of storage cabinet;
FIG. 3 is a rear side view of the decoration of storage cabinet;
FIG. 4 is a left side view of the decoration of storage cabinet;
FIG. 5 is a right side view of the decoration of storage cabinet;
FIG. 6 is a top view of the decoration of storage cabinet; and,
FIG. 7 is a bottom view of the decoration of storage cabinet.
The broken lines in the drawings are for the purpose of illustrating portions of the decoration of storage cabinet that form no part of the claimed design.