The ornamental design for a portablememorydrive, as shown and described.
FIG. 1 is a perspective view of a portable memory drive in accordance with an embodiment of the present invention.
FIG. 2 is a side view of the portable memory drive of FIG. 1.
FIG. 3 is a top view of the portable memory drive of FIG. 1.
FIG. 4 is a second side view of the portable memory drive of FIG. 1.
FIG. 5 is a bottom view of the portable memory drive of FIG. 1.
FIG. 6 is an end view of the portable memory drive of FIG. 1; and,
FIG. 7 is a second end view of the portable memory drive of FIG. 1.
The broken line showing of the connector is for the purpose of illustrating an unclaimed portion of the portable memory drive and forms no part of the claimed design. The line surface shading is for the purpose of showing contour and is not surface ornamentation.