Disk fill by files

#!/bin/bash

cd files

i=0
while (( i < 1000 ))
do
        mkdir $i
        cd $i
        j=0
        while (( j < 1000 ))
        do
                mkdir $j
                cd $j
                echo i=$i j=$j
                k=0
                while (( k < 1000 ))
                do
                        ( dd if=/dev/zero of=$k bs=10K count=1 status=progress ) >/dev/null 2>&1
                        ((k += 1))
                done
                cd ..
                ((j += 1))
        done
        cd ..
        ((i += 1))
done