The ornamental design for a flagdisplay and storagedevice, as shown and described.
FIG. 1 is a front elevational view of a flag display and storage device showing my new design;
FIG. 2 is an additional front elevational view thereof; and,
FIG. 3 is a bottom and right side isometric view thereof.
The broken line disclosure of the flag in the views is intended to be for illustrative purposes only and forms no part of the claimed design. The broken line disclosure of structure is understood to represent an unclaimed boundary of elements of the article in which the design is embodied, but which form no part of the claimed design.