use strict;
use warnings;

my @test;

while (my $line = <DATA>) {
    if ($line =~ /("[^"]*")/) {
        my $keep = $1;    
        push(@test,$keep);
    }
}

(print join "\n", @test) if @test;

__DATA__
rmdir: directory "SAS_util0001000021A9_sasux101": Directory
 rmdir: directory "SAS_util000100002E19_sasux101": Directory
 rmdir: directory "SAS_util000100005891_sasux101": Directory
[download]

Prints:

"SAS_util0001000021A9_sasux101"
"SAS_util000100002E19_sasux101"
"SAS_util000100005891_sasux101"
[download]