diff --git a/home.admin/config.scripts/blitz.sdcard.sh b/home.admin/config.scripts/blitz.sdcard.sh
new file mode 100644
index 000000000..2f8b8ceff
--- /dev/null
+++ b/home.admin/config.scripts/blitz.sdcard.sh
@@ -0,0 +1,83 @@
+#!/bin/bash
+
+# basic background on this feature
+# see: https://github.com/rootzoll/raspiblitz/issues/936
+
+# get basic system information
+# these are the same set of infos the WebGUI dialog/controler has
+source /home/admin/raspiblitz.info </dev/null
+
+# command info
+if [ "$1" = "-h" ] || [ "$1" = "-help" ]; then
+ echo "tools for the sd card"
+ echo "blitz.sdcard.sh status"
+ echo "blitz.sdcard.sh expand"
+ exit 1
+fi
+
+# check if sudo
+if [ "$EUID" -ne 0 ]
+  then echo "Please run as root (with sudo)"
+  exit 1
+fi
+
+# gather data on sd card
+minimumSizeByte=8192000000
+rootPartition=$(sudo mount | grep " / " | cut -d " " -f 1 | cut -d "/" -f 3)
+rootPartitionBytes=$(lsblk -b -o NAME,SIZE | grep "${rootPartition}" | tr -s ' ' | cut -d " " -f 2)
+
+# make conculsions
+needsExpansion=0
+tooSmall=0
+if [ $rootPartitionBytes -lt $minimumSizeByte ]; then
+    needsExpansion=1
+    if [ "${fsexpanded}" == "1" ]; then
+        tooSmall=1
+    fi
+fi
+
+if [ "${action}" == "status" ]; then
+
+    echo "rootPartition='${rootPartition}'"
+    echo "rootPartitionBytes=${rootPartitionBytes}"
+    echo "needsExpansion=${needsExpansion}"
+    echo "fsexpanded=${fsexpanded}" # from raspiblitz.info
+    echo "tooSmall=${tooSmall}"
+    exit 0
+fi
+
+if [ "${action}" == "fsexpand" ]; then
+
+    echo "# starting expand of file system of sd card"
+    sudo sed -i "s/^fsexpanded=.*/fsexpanded=1/g" ${infoFile}
+
+    if [ "${baseimage}" = "raspbian" ] || [ "${baseimage}" = "raspios_arm64" ]; then
+        resizeRaspbian="/usr/bin/raspi-config"
+        if [ -x ${resizeRaspbian} ]; then
+            echo "# RUNNING EXPAND RASPBERRYPI: ${resizeRaspbian}"
+		    sudo $resizeRaspbian --expand-rootfs
+	    else
+            echo "# FAIL to execute on ${baseimage}: ${resizeRaspbian}"
+            echo "err='expand failed'"
+            exit 1
+        fi
+    elif [ "${baseimage}" = "armbian" ]; then
+        resizeArmbian="/usr/lib/armbian/armbian-resize-filesystem"
+        if [ -x ${resizeArmbian} ]; then
+            echo "# RUNNING EXPAND ARMBIAN: ${resizeArmbian}"
+            sudo $resizeArmbian start
+	    else
+            echo "# FAIL to execute on ${baseimage}: ${resizeArmbian}"
+            echo "err='expand failed'"
+            exit 1
+        fi
+    else
+        echo "#FAIL no implementation for: ${baseimage}"
+        echo "err='missing implementation'"
+        exit 1
+    fi
+    exit 0
+fi
+
+echo "err='unknown parameter'"
+exit 1
\ No newline at end of file