my $ftp_dir_base = '\Folder\Somefolder\ONE TWO Three\_Some_Path\ONE TWO Three Path1';

my $ftp_dir0 = "\Folder\Somefolder";
my $ftp_dir1 = "ONE TWO Three";

print "CWD to: $ftp_dir0\n";
$ftp->cwd($ftp_dir0) or die "Can't go to $ftp_dir0: $!";

print "CWD to: $ftp_dir1\n";
$ftp->cwd($ftp_dir1) or die "Can't go to $ftp_dir1: $!";

##</code><code>##

my $ftp_dir1 = "\"ONE TWO Three\"";
my $ftp_dir1 = 'ONE TWO Three';
my $ftp_dir1 = '"ONE TWO Three"';
my $ftp_dir1 = "ONE\ TWO\ Three";
$ftp->cwd('ONE TWO Three') or die "Can't go to $ftp_dir1: $!";