diff --git a/content/hardware/04.pro/boards/portenta-h7/tutorials/flash-optimized-key-value-store/content.md b/content/hardware/04.pro/boards/portenta-h7/tutorials/flash-optimized-key-value-store/content.md
index 3daff4e06c..7900f0addb 100644
--- a/content/hardware/04.pro/boards/portenta-h7/tutorials/flash-optimized-key-value-store/content.md
+++ b/content/hardware/04.pro/boards/portenta-h7/tutorials/flash-optimized-key-value-store/content.md
@@ -161,11 +161,15 @@ void setup()
   srand(micros());
 
   // Initialize the flash IAP block device and print the memory layout
-  blockDevice.init();
-  Serial.printf("FlashIAP block device size: %llu\r\n", blockDevice.size());
-  Serial.printf("FlashIAP block device read size: %llu\r\n", blockDevice.get_read_size());
-  Serial.printf("FlashIAP block device program size: %llu\r\n", blockDevice.get_program_size());
-  Serial.printf("FlashIAP block device erase size: %llu\r\n", blockDevice.get_erase_size());
+  blockDevice.init();  
+  Serial.print("FlashIAP block device size: ");
+  Serial.println(blockDevice.size());
+  Serial.print("FlashIAP block device read size: ");
+  Serial.println(blockDevice.get_read_size());
+  Serial.print("FlashIAP block device program size: ");
+  Serial.println(blockDevice.get_program_size());
+  Serial.print("FlashIAP block device erase size: ");
+  Serial.println(blockDevice.get_erase_size());
   // Deinitialize the device
   blockDevice.deinit();