I claim the ornamental design for a hard drive adapter, as shown and described.
FIG. 1 is a top perspective view of a hard drive adapter;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is an exploded perspective view of an assembly including the hard drive adapter;
FIG. 9 is a perspective view of the assembly including the hard drive adapter; and,
FIG. 10 is a perspective view of the assembly including the hard drive adapter and a hard drive.
The dash-dash broken lines in the drawings are environmental lines which do not form part of the claimed design. The short dash-long dash lines are boundary lines which do not form part of the claimed design.