FIG. 1 is a perspective view of a expandable file portfolio showing my new design; FIG. 2 is a top plan view thereof; FIG. 3 is a front elevational view thereof; FIG. 4 is a right side elevational view thereof, the left side elevational view being the mirror image thereof; FIG. 5 is a bottom plan view thereof FIG. 6 is a rear elevational view thereof; FIG. 7 is an enlarged view of a portion of FIG. 6 showing the texture of the surface; and, FIG. 8 is a perspective view thereof in an open position.