The ornamental design for a plug-in data storagecartridge, as shown and described.
FIG. 1 is a right side elevational view of a plug-in data storage cartridge which forms my new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a front elevational view thereof; and,
FIG. 6 is a perspective view showing the front, top and right side thereof.
The broken line showing in FIG. 3 is included for the purpose of illustrating unclaimed portions of the plug-in data storage cartridge and form no part of the claimed design.