diff --git a/ct/adguard-v4.sh b/ct/adguard-v4.sh
index ad961086..bb40f982 100644
--- a/ct/adguard-v4.sh
+++ b/ct/adguard-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/daemonsync-v4.sh b/ct/daemonsync-v4.sh
index f805e6ac..3fee2a6e 100644
--- a/ct/daemonsync-v4.sh
+++ b/ct/daemonsync-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/dashy-v4.sh b/ct/dashy-v4.sh
index ab5bac02..5383cf97 100644
--- a/ct/dashy-v4.sh
+++ b/ct/dashy-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/debian-v4.sh b/ct/debian-v4.sh
index 8e2cbcab..fb470b8a 100644
--- a/ct/debian-v4.sh
+++ b/ct/debian-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/deconz-v4.sh b/ct/deconz-v4.sh
index 388083aa..28db39a2 100644
--- a/ct/deconz-v4.sh
+++ b/ct/deconz-v4.sh
@@ -149,6 +149,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/docker-v4.sh b/ct/docker-v4.sh
index 50deaa4d..d83382b7 100644
--- a/ct/docker-v4.sh
+++ b/ct/docker-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/esphome-v4.sh b/ct/esphome-v4.sh
index a3409634..e6488c95 100644
--- a/ct/esphome-v4.sh
+++ b/ct/esphome-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/grafana-v4.sh b/ct/grafana-v4.sh
index 9ec1d569..7ed70c2c 100644
--- a/ct/grafana-v4.sh
+++ b/ct/grafana-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/grocy-v4.sh b/ct/grocy-v4.sh
index 172f92c0..680bcc4a 100644
--- a/ct/grocy-v4.sh
+++ b/ct/grocy-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/heimdalldashboard-v4.sh b/ct/heimdalldashboard-v4.sh
index 6fecd9d9..3b5c52bd 100644
--- a/ct/heimdalldashboard-v4.sh
+++ b/ct/heimdalldashboard-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/homeassistant-v4.sh b/ct/homeassistant-v4.sh
index 9af2f420..17ff5cdc 100644
--- a/ct/homeassistant-v4.sh
+++ b/ct/homeassistant-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/homebridge-v4.sh b/ct/homebridge-v4.sh
index fc197eb6..87b60dcb 100644
--- a/ct/homebridge-v4.sh
+++ b/ct/homebridge-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/influxdb-v4.sh b/ct/influxdb-v4.sh
index 865c93cc..f7b0fa7a 100644
--- a/ct/influxdb-v4.sh
+++ b/ct/influxdb-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/iobroker-v4.sh b/ct/iobroker-v4.sh
index 2cf95f20..7b56f873 100644
--- a/ct/iobroker-v4.sh
+++ b/ct/iobroker-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/jellyfin-v4.sh b/ct/jellyfin-v4.sh
index bf6c0d7f..210bfdf9 100644
--- a/ct/jellyfin-v4.sh
+++ b/ct/jellyfin-v4.sh
@@ -149,6 +149,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/keycloak-v4.sh b/ct/keycloak-v4.sh
index 739dc010..61954dae 100644
--- a/ct/keycloak-v4.sh
+++ b/ct/keycloak-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/magicmirror-v4.sh b/ct/magicmirror-v4.sh
index 237ff677..9f81130a 100644
--- a/ct/magicmirror-v4.sh
+++ b/ct/magicmirror-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/mariadb-v4.sh b/ct/mariadb-v4.sh
index ceabd448..effb77bf 100644
--- a/ct/mariadb-v4.sh
+++ b/ct/mariadb-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/meshcentral-v4.sh b/ct/meshcentral-v4.sh
index fc66509e..35ef4971 100644
--- a/ct/meshcentral-v4.sh
+++ b/ct/meshcentral-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/motioneye-v4.sh b/ct/motioneye-v4.sh
index 64d25618..0ce01077 100644
--- a/ct/motioneye-v4.sh
+++ b/ct/motioneye-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/mqtt-v4.sh b/ct/mqtt-v4.sh
index 624297b3..01638788 100644
--- a/ct/mqtt-v4.sh
+++ b/ct/mqtt-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/n8n-v4.sh b/ct/n8n-v4.sh
index 22863a44..5cdcc286 100644
--- a/ct/n8n-v4.sh
+++ b/ct/n8n-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/nginx-proxy-manager-v4.sh b/ct/nginx-proxy-manager-v4.sh
index 1dd6b6a7..39ffe521 100644
--- a/ct/nginx-proxy-manager-v4.sh
+++ b/ct/nginx-proxy-manager-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/nocodb-v4.sh b/ct/nocodb-v4.sh
index 6b3566f1..08e6fd4b 100644
--- a/ct/nocodb-v4.sh
+++ b/ct/nocodb-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/node-red-v4.sh b/ct/node-red-v4.sh
index f79341df..04aba883 100644
--- a/ct/node-red-v4.sh
+++ b/ct/node-red-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/omada-v4.sh b/ct/omada-v4.sh
index 9c121060..6236796c 100644
--- a/ct/omada-v4.sh
+++ b/ct/omada-v4.sh
@@ -149,6 +149,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/openhab-v4.sh b/ct/openhab-v4.sh
index ae186e7d..128a0223 100644
--- a/ct/openhab-v4.sh
+++ b/ct/openhab-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/photoprism-v4.sh b/ct/photoprism-v4.sh
index 41ed38cb..9ffc9399 100644
--- a/ct/photoprism-v4.sh
+++ b/ct/photoprism-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/pihole-v4.sh b/ct/pihole-v4.sh
index 6fbfa78a..60dd7c25 100644
--- a/ct/pihole-v4.sh
+++ b/ct/pihole-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/plex-v4.sh b/ct/plex-v4.sh
index cde23da8..9c43b82c 100644
--- a/ct/plex-v4.sh
+++ b/ct/plex-v4.sh
@@ -149,6 +149,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/podman-homeassistant-v4.sh b/ct/podman-homeassistant-v4.sh
index 79f851a6..6c97d5d8 100644
--- a/ct/podman-homeassistant-v4.sh
+++ b/ct/podman-homeassistant-v4.sh
@@ -150,6 +150,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/postgresql-v4.sh b/ct/postgresql-v4.sh
index 33f06931..7d8c4d13 100644
--- a/ct/postgresql-v4.sh
+++ b/ct/postgresql-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/prometheus-v4.sh b/ct/prometheus-v4.sh
index 13ae0854..554e531f 100644
--- a/ct/prometheus-v4.sh
+++ b/ct/prometheus-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/technitiumdns-v4.sh b/ct/technitiumdns-v4.sh
index 061ef6b2..fa20dafc 100644
--- a/ct/technitiumdns-v4.sh
+++ b/ct/technitiumdns-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/ubuntu-v4.sh b/ct/ubuntu-v4.sh
index fd4c3077..8df0e0f4 100644
--- a/ct/ubuntu-v4.sh
+++ b/ct/ubuntu-v4.sh
@@ -149,6 +149,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/unifi-v4.sh b/ct/unifi-v4.sh
index f7cea5c7..71f3ac51 100644
--- a/ct/unifi-v4.sh
+++ b/ct/unifi-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/uptimekuma-v4.sh b/ct/uptimekuma-v4.sh
index 8569b392..3a806bff 100644
--- a/ct/uptimekuma-v4.sh
+++ b/ct/uptimekuma-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/vaultwarden-v4.sh b/ct/vaultwarden-v4.sh
index f82d066f..fa33cb7b 100644
--- a/ct/vaultwarden-v4.sh
+++ b/ct/vaultwarden-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/whoogle-v4.sh b/ct/whoogle-v4.sh
index bf0f9b9e..f5dabd3e 100644
--- a/ct/whoogle-v4.sh
+++ b/ct/whoogle-v4.sh
@@ -146,6 +146,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/wireguard-v4.sh b/ct/wireguard-v4.sh
index f63f5202..6e2e9282 100644
--- a/ct/wireguard-v4.sh
+++ b/ct/wireguard-v4.sh
@@ -148,6 +148,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/zigbee2mqtt-v4.sh b/ct/zigbee2mqtt-v4.sh
index 0a8e837e..2c5662e2 100644
--- a/ct/zigbee2mqtt-v4.sh
+++ b/ct/zigbee2mqtt-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi
diff --git a/ct/zwavejs2mqtt-v4.sh b/ct/zwavejs2mqtt-v4.sh
index 9c732818..9854db8e 100644
--- a/ct/zwavejs2mqtt-v4.sh
+++ b/ct/zwavejs2mqtt-v4.sh
@@ -147,6 +147,7 @@ DISK_SIZE=$(whiptail --inputbox "Set Disk Size in GB" 8 58 $var_disk --title "DI
 exitstatus=$?
 if [ $exitstatus = 0 ]; then
     echo -e "${DGN}Using Disk Size: ${BGN}$DISK_SIZE${CL}"
+    if ! [[ $DISK_SIZE =~ $INTEGER ]] ; then echo -e "${RD}⚠ DISK SIZE MUST BE A INTEGER NUMBER!${CL}"; advanced_settings; fi;
 else
     exit
 fi