diff --git a/operame.ino b/operame.ino
index a8f2fcc..d9c564a 100644
--- a/operame.ino
+++ b/operame.ino
@@ -267,25 +267,41 @@ int get_co2() {
 void setup() {
     Serial.begin(115200);
     Serial.println("Operame start");
-    SPIFFS.begin(true);
+
+    digitalWrite(pin_backlight, HIGH);
+    display.init();
+    display.fillScreen(TFT_BLACK);
+    display.setRotation(1);
+    sprite.createSprite(display.width(), display.height());
+
+    OperameLanguage::select(T, LANGUAGE);
+
+    if (!SPIFFS.begin(false)) {
+        display_lines(T.first_run, TFT_MAGENTA);
+        if (!SPIFFS.format()) {
+            display_big(T.error_format, TFT_RED);
+            delay(20*1000);
+        }
+    }
 
     pinMode(pin_portalbutton,   INPUT_PULLUP);
     pinMode(pin_demobutton,     INPUT_PULLUP);
     pinMode(pin_pcb_ok,         INPUT_PULLUP);
     pinMode(pin_backlight,      OUTPUT);
 
-    digitalWrite(pin_backlight, HIGH);
-
-    display.init();
-    display.fillScreen(TFT_BLACK);
-    display.setRotation(1);
-    sprite.createSprite(display.width(), display.height());
+    WiFiSettings.hostname = "operame-";
+    WiFiSettings.language = LANGUAGE;
+    WiFiSettings.begin();
+    OperameLanguage::select(T, WiFiSettings.language);
 
     while (digitalRead(pin_pcb_ok)) {
         display_big(T.error_module, TFT_RED);
         delay(1000);
     }
 
+    display_logo();
+    delay(2000);
+
     hwserial1.begin(9600, SERIAL_8N1, pin_sensor_rx, pin_sensor_tx);
 
     if (aqc_get_co2() >= 0) {
@@ -298,14 +314,7 @@ void setup() {
         Serial.println("Using MHZ driver.");
     }
 
-    display_logo();
-    delay(2000);
 
-    WiFiSettings.hostname = "operame-";
-    WiFiSettings.language = LANGUAGE;
-    WiFiSettings.begin();
-
-    OperameLanguage::select(T, WiFiSettings.language);
     for (auto& str : T.portal_instructions[0]) {
         str.replace("{ssid}", WiFiSettings.hostname);
     }
@@ -328,7 +337,6 @@ void setup() {
     mqtt_template = WiFiSettings.string("operame_mqtt_template", "{} PPM", T.config_mqtt_template);
     WiFiSettings.info(T.config_template_info);
 
-
     WiFiSettings.onConnect = [] {
         display_big(T.connecting, TFT_BLUE);
         check_portalbutton();
diff --git a/operame_strings.h b/operame_strings.h
index eb4350c..cdae1d9 100644
--- a/operame_strings.h
+++ b/operame_strings.h
@@ -12,6 +12,7 @@ struct Texts {
         *error_timeout,
         *error_sensor,
         *error_wifi,
+        *error_format,
         *config_wifi,
         *config_ota,
         *config_co2_warning,
@@ -29,6 +30,7 @@ struct Texts {
         *wait
     ;
     std::vector<std::list<String>> portal_instructions;
+    std::list<String> first_run;
 };
 
 std::map<const String, const String> languages {
@@ -54,6 +56,7 @@ bool select(Texts& T, String language) {
         T.error_timeout = "Time's up";
         T.error_sensor = "sensor error";
         T.error_wifi = "WiFi failed!";
+        T.error_format = "Formatting failed";
         T.wait = "wait...";
         T.config_wifi = "Use WiFi connection";
         T.config_ota = "Enable wireless reprogramming. (Uses portal password!)";
@@ -93,6 +96,11 @@ bool select(Texts& T, String language) {
                 "when you're done."
             }
         };
+        T.first_run = {
+            "DO NOT TURN OFF",
+            "Initializing",
+            "flash memory.",
+        };
         return true;
     }
 
@@ -103,6 +111,7 @@ bool select(Texts& T, String language) {
         T.error_timeout = "Tijd verstreken";
         T.error_sensor = "sensorfout";
         T.error_wifi = "WiFi mislukt!";
+        T.error_format = "Formatteren mislukt";
         T.wait = "wacht...";
         T.config_wifi = "WiFi-verbinding gebruiken";
         T.config_ota = "Draadloos herprogrammeren inschakelen. (Gebruikt portaalwachtwoord!)";
@@ -142,6 +151,12 @@ bool select(Texts& T, String language) {
                 "als u klaar bent."
             }
         };
+        T.first_run = {
+            "NIET",
+            "UITSCHAKELEN",
+            "Flashgeheugen",
+            "wordt voorbereid."
+        };
         return true;
     }