The ornamental design for a memorystoragedevice, as shown and described.
FIG. 1 is a front perspective view of a memory storage device showing my new design with a handle detached from a base.
FIG. 2 is a front perspective view of the memory storage device of FIG. 1 showing the handle attached to the base.
FIG. 3 is a front elevational view of the memory storage device of FIG. 2.
FIG. 4 is a rear elevational view thereof.
FIG. 5 is a right side elevational view thereof.
FIG. 6 is a left side elevational view thereof.
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken line showings are included for the purpose of illustrating unclaimed portions of the memory storage device while the broken line immediately adjacent the solid line circle in FIG. 8 defines the bounds of the claimed design. The broken lines form no part of the claimed design.