diff --git a/archinstall.sh b/archinstall.sh
index 3514196..837d8a0 100755
--- a/archinstall.sh
+++ b/archinstall.sh
@@ -14,6 +14,7 @@ function show_help() {
   echo " -m <keymap>   Console Keymap to use (default: de)"
   echo " -t <timezone> Timezone to use (default: Europe/Berlin)" 
   echo " -h <hostname> Set the Target Hostname" 
+  echo " -s <hddsize>  Only use hddsize for the system partition" 
   echo " -b            Set System Type to BIOS (default: UEFI)"
   echo " -c            Disable Encryption (default: enabled)"
 } 
@@ -47,9 +48,10 @@ timezone="Europe/Berlin"
 systype="x86_64-efi"
 network=0
 encryption=1
+hddsize="100%"
 
 ## Get CLI Options
-while getopts 'k:d:n:m:l:h:bc?' flag; do
+while getopts 'k:d:n:m:l:h:s:t:bc?' flag; do
   case "${flag}" in
     k) kernel="${OPTARG}" ;;
     n) case "${OPTARG}" in
@@ -65,6 +67,7 @@ while getopts 'k:d:n:m:l:h:bc?' flag; do
     b) systype="i386-pc" ;;
     c) encryption=0 ;;
     h) hostname="${OPTARG}" ;;
+    s) hddsize="${OPTARG}" ;;
     ?) show_help ;;
     *) show_help ;;
   esac
@@ -104,7 +107,7 @@ if [[ "${systype}" == "x86_64-efi" ]]; then
     mklabel gpt \
     mkpart ESP fat32 1MiB 513MiB \
     set 1 esp on \
-    mkpart arch 514MiB 100%
+    mkpart arch 514MiB ${hddsize}
   
   part_esp="/dev/disk/by-partlabel/ESP"
   part_root="/dev/disk/by-partlabel/arch"