Thanks for the replies! I am putzing along making slow progress. I went with File::Find::Rule to find the files for now.

#!/usr/bin/perl

use strict;
use warnings;
use File::Find::Rule;
use Storable qw(retrieve);
use Data::Dumper;


my @files = File::Find::Rule->file()
                              ->name( '*.foo__bar_ar' )
                              ->in('/home/foo/bar/snafu');
#print Dumper (@files);



    foreach my $row (@files) {
        my @total_data = retrieve($row);
        my $target_data = map $_->[11], @total_data;
  
        print "Target data: $target_data\n";

    }
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I am unsuccessfully attempting to print the data from the nstore files.(trying to test the concept, haven't even started down the path of cramming them into an array for eventual dump to csv) Instead I am getting the number "1" the same amount of times as I have files in the directory.

Input files (arrays stored by storable)

thing1.foo__bar_ar
1,18.4,7.6,10.8,0.584615384615385,22,4.0,18,0.307692307692308,0.664861
+632672521,0.968405008381221,0.816633320526871
0,31.5,18.9,12.6,0.75,199.7,29.2,170.5,0.255133245958934,0.15079674831
+7197,0.968809826017511,0.559803287167354
0,115.2,35.9,79.3,0.475181998676373,13.7,8.3,5.4,0.754545454545455,0.8
+55054749249092,0.272628302983597,0.563841526116344
0,969.7,1034.6,-64.8999999999999,1.03238038217832,1607.6,582.0,1025.6,
+0.531603945926197,0.0340815410482703,0.81304569847144,0.4235636197598
+55
0,3.2,13.2,-10,1.60975609756098,22.2,58.2,-36,1.44776119402985,0.00018
+9855866797165,0.000793472305521753,0.000491664086159459

thing2.foo__bar_ar
0,124,24.9,99.1,0.334452652787105,533.5,764.2,-230.7,1.17777606534638,
+0.959457725728336,0.00783065425975528,0.483644189994046
0,23.1,21.3,1.8,0.959459459459459,111.4,35.7,75.7,0.485384092454113,0.
+051736839732654,0.841995362489232,0.446866101110943
0,65.2,106.7,-41.5,1.24141942990111,10.5,23.1,-12.6,1.375,0.0045736005
+1269834,0.00151695997213462,0.00304528024241648
0,4309.7,162.2,4147.5,0.0725418725821239,5949.4,350.9,5598.5,0.1113915
+21038681,0.995577034355054,0.993485851801997,0.994531443078526
0,10.5,17.7,-7.2,1.25531914893617,9.9,17.1,-7.2,1.26666666666667,0.001
+24657203727433,0.00112269442213042,0.00118463322970237

thing3.foo__bar_ar
0,3384.5,129.2,3255.3,0.0735407120698978,19718.2,2209.1,17509.1,0.2014
+93115887501,0.995983099858049,0.988053036660467,0.992018068259258
0,2483.6,571.2,1912.4,0.373968835930339,139.1,23.8,115.3,0.29220380601
+5961,0.995670903509154,0.998383366800592,0.997027135154873
1,13.7,26.3,-12.6,1.315,12.3,3.2,9.1,0.412903225806452,0.0002556958960
+69042,0.821140634122146,0.410698165009108
0,11323.1,1750.2,9572.9,0.26775183006586,1886.3,49.6,1836.7,0.05124231
+62353427,0.964837401973032,0.994660051822814,0.979748726897923
0,18789.6,2845.0,15944.6,0.26300463146996,2834.9,86.2,2748.7,0.0590188
+627571804,0.966390332824062,0.99432887614011,0.980359604482086

thing4.foo__bar_ar
0,9239.1,2341.0,6898.1,0.404314297803991,8755.6,920.3,7835.3,0.1902251
+98689528,0.938134184255461,0.986710551917049,0.962422368086255
0,640.2,29.2,611,0.0872423065431731,291.6,19.5,272.1,0.125361620057859
+,0.992917934751572,0.990319885849402,0.991618910300487
0,96.4,24.3,72.1,0.402651201325601,315.1,62.7,252.4,0.331921651667549,
+0.873629030952342,0.935006962479539,0.904317996715941
1,44.7,46.5,-1.8,1.01973684210526,19.6,53.9,-34.3,1.46666666666667,0.0
+629076470018427,0.000324736116046742,0.0316161915589447
1,66.5,17.8,48.7,0.422301304863582,29.6,26.0,3.6,0.935251798561151,0.9
+08927363824235,0.0637831300468857,0.48635524693556
[download]

Desired Output (the 11th spot (0-11) for each row of each array)

Number,thing1, thing2, thing 3, thing4

1,0.816633320526871,0.483644189994046,0.992018068259258,0.962422368086
+255
2,0.559803287167354,0.446866101110943,0.997027135154873,0.991618910300
+487
3,0.563841526116344,0.00304528024241648,0.410698165009108,0.9043179967
+15941
4,0.423563619759855,0.994531443078526,0.979748726897923,0.031616191558
+9447
5,0.000491664086159459,0.00118463322970237,0.980359604482086,0.4863552
+4693556
[download]