Example filenames are available in the example. The first two
    example specifications reference FAT filenames, while the third
    example shown references a directory. The final shows use of
    double quotes, which are needed when the specification contains
    characters such as spaces, to specify a particular directory.

    Relative directory specifications and multiple FAT device mounts
    are not presently available; all FAT specifications are absolute,
    and only one FAT device can be mounted within EFI$CP at any one
    time. No wildcards are presently available.