The ornamental design for the USB device holder, as shown and described.
FIG. 1 is a front perspective view of a USB device holder showing the new design;
FIG. 2 is a rear perspective view of the USB device holder shown in FIG. 1;
FIG. 3 is a front elevational view of the USB device holder shown in FIG. 1;
FIG. 4 is a rear elevational view of the USB device holder shown in FIG. 1;
FIG. 5 is a top plan view of the USB device holder shown in FIG. 1;
FIG. 6 is a left side elevational view of the USB device holder shown in FIG. 1; and,
FIG. 7 is a right side elevational view of the USB device holder shown in FIG. 1.
The broken line showings of the USB device and the texturing on the perimeter of the USB device holder are included for the purpose of illustrating portions of the USB device holder and form no part of the claimed design.