FIG. 1 is a perspective front-top-right side view of an external backup storage according to the invention;
FIG. 2 is a right side view of an external backup storage according to the invention;
FIG. 3 is a left side view of an external backup storage according to the invention;
FIG. 4 is a front view of an external backup storage according to the invention;
FIG. 5 is a rear view of an external backup storage according to the invention;
FIG. 6 is a top view of an external backup storage according to the invention; and,
FIG. 7 is a bottom view of an external backup storage according to the invention.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.