The ornamental design for folio folder, as shown and described herein.
FIG. 1, shows a perspective view of a folio folder showing my new design;
FIG. 2, shows a top plan view thereof, the bottom plan view being a mirror image thereof;
FIG. 3, is a front elevation view thereof;
FIG. 4, is a right side elevation view thereof, the left side being a mirror image thereof; and,
FIG. 5, is a rear elevation view thereof.
The broken lines immediately adjacent the shaded areas depict the boundaries of the claimed design while all other broken lines are directed to environment.
In addition, the unshaded surfaces that directly adjoin the claimed solid lines edges and the dash-dot-dash broken lines form no part of the claimed design.
The dashed cutaway symbols illustrated in break lines shown in FIGS. 1, and 3-5 indicate a break in length. The appearance of any portion of the article between the break lines form no part of the claimed design.