Try Win32::Unicode with Path::Tiny like

#!/usr/bin/perl --
BEGIN {
    if ( eval { require Win32; 1 } ) {
        require ex::override;
        require Win32::Unicode::Native;
        ex::override->import(
            GLOBAL_stat => sub (;*) { &Win32::Unicode::Native::stat },
            GLOBAL_lstat => sub (;*) { &Win32::Unicode::Native::stat }
+,
            map({
                    my $name = $_;
                    my $prototype = prototype("CORE::$name");
                    "GLOBAL_$name" => eval "sub($prototype){&Win32::Un
+icode::Native::$name}";
                }
                qw/ chdir link mkdir open readlink rename rmdir
                    symlink unlink utime closedir opendir readdir 
                /,
            )
        );
    }
}


use Path::Tiny qw/ path /;
for my $drive ( @drives ){
    my @picdirs = grep /^\d{4}_\d{2}_\d{2}$/,
                    eval { path( $drive, $dir )->children };
    if( @picdirs ){
        ...;
    }
}
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