diff --git a/test/w25q128_test/w25q128_test.ino b/test/w25q128_test/w25q128_test.ino
new file mode 100644
index 0000000..1f21857
--- /dev/null
+++ b/test/w25q128_test/w25q128_test.ino
@@ -0,0 +1,78 @@
+#include <SPI.h>
+#include <SdFat.h>
+#include <Adafruit_SPIFlash.h>
+
+#ifndef FLASH_CONFIG_H_
+#define FLASH_CONFIG_H_
+
+#define EXTERNAL_FLASH_USE_CS 22
+#define EXTERNAL_FLASH_USE_SPI SPI
+
+Adafruit_FlashTransport_SPI flashTransport(EXTERNAL_FLASH_USE_CS, EXTERNAL_FLASH_USE_SPI);
+
+#endif
+
+Adafruit_SPIFlash flash(&flashTransport);
+
+FatVolume fatfs;  // file system object from SdFat
+
+#define FILE_NAME "data.csv"  //ファイル名を指定
+
+void setup() {
+  // Initialize serial port and wait for it to open before continuing.
+  Serial.begin(115200);
+  while (!Serial) {
+    delay(100);
+  }
+  Serial.println("Adafruit SPI Flash FatFs Simple Datalogging Example");
+
+  // Initialize flash library and check its chip ID.
+  if (!flash.begin()) {
+    Serial.println("Error, failed to initialize flash chip!");
+    while (1) {
+      delay(1);
+    }
+  }
+  Serial.print("Flash chip JEDEC ID: 0x");
+  Serial.println(flash.getJEDECID(), HEX);
+
+  // First call begin to mount the filesystem.  Check that it returns true
+  // to make sure the filesystem was mounted.
+  if (!fatfs.begin(&flash)) {
+    Serial.println("Error, failed to mount newly formatted filesystem!");
+    Serial.println(
+      "Was the flash chip formatted with the fatfs_format example?");
+    while (1) {
+      delay(1);
+    }
+  }
+
+  Serial.println("Mounted filesystem!");
+  Serial.println("Logging data every 60 seconds...");
+}
+
+void loop() {
+  // Open the datalogging file for writing.  The FILE_WRITE mode will open
+  // the file for appending, i.e. it will add new data to the end of the file.
+  File32 dataFile = fatfs.open(FILE_NAME, FILE_WRITE);
+  // Check that the file opened successfully and write a line to it.
+  if (dataFile) {
+    // Take a new data reading from a sensor, etc.  For this example just
+    // Write a line to the file.  You can use all the same print functions
+    // as if you're writing to the serial monitor.  For example to write
+    // two CSV (commas separated) values:
+    dataFile.print("Sensor #1");
+    dataFile.print(",");
+    dataFile.print(reading, DEC);  //必要なデータの代入
+    dataFile.println();
+    dataFile.close();
+    Serial.println("Wrote new measurement to data file!");
+  } else {
+    Serial.println("Failed to open data file for writing!");
+  }
+
+  Serial.println("Trying again in 60 seconds...");
+
+  // Wait 60 seconds.
+  delay(60000L);  //時間を適切な時間に修正
+}
\ No newline at end of file