I claim the ornamental design for a storage device for use with a watercraft, as shown and described.
FIG. 1 is a top perspective view showing the storage device attached to a watercraft (e.g., a paddleboard) and storing a paddle;
FIG. 2 is a rear perspective view showing the storage device;
FIG. 3 is a rear elevational view showing the storage device;
FIG. 4 is a right side elevational view showing the storage device;
FIG. 5 is a left side elevational view showing the storage device;
FIG. 6 is a front elevational view showing the storage device;
FIG. 7 is a top elevational view showing the storage device; and,
FIG. 8 is a bottom elevational view showing the storage device.
The broken lines shown are included for the purpose of illustrating portions of the article (such as but not limited to the paddle, paddleboard, inflation valve, rope ties, bungee cords, and elements shown on the bottom of FIG. 8) which form no part of the claimed design.