diff --git a/README.md b/README.md
index 4199ed8..f6c9c92 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,12 @@
 <h1 align="center">This a portable mini photo camera.It has also a flash.</h1>  
 
 
+## 🔎 Preparation
+1. `Use an SD card with a minimum capacity of 4 GB, formatted as FAT32 with a 32 KB allocation unit size.`
+2. `Then insert this SD card into your ESP32-CAM board.`
+2. `Connect your OV2640 camera to your ESP32-CAM board.`
+
+
 ## 📦 Setup 
 1. `Refer to the circuit diagram`
 2. `Install the 'Arduino IDE' software and open 'esp32-cam_camera.ino' file`