Thank you for the advice.
and, I'm very sorry.
the connection and sketch I indicated was wrong.
confused.

Finally I reffer and correct information are here.

Maybe, it is almost dead copy of the refference page.

https://lang-ship.com/blog/work/m5stickc-spi-sd-3wire/

M5StickCPlus >>>> SD
3V3 >>>> 3V3
GND >>>> GND
0 >>>> CLK
36 >>>> MISO
26 >>>> MOSI
GND >>>> CS

#include <M5StickCPlus.h>
#include "SD.h"
SPIClass SPI_EXT;
// PIN配置
enum { spi_sck = 0, spi_miso = 36, spi_mosi = 26, spi_ss = -1 };
void setup()
{
  // M5StickC initialize
  M5.begin();
  M5.Lcd.setRotation(3);
  // SPI initialize
  SPI_EXT.begin(spi_sck, spi_miso, spi_mosi, spi_ss);
  // SD initialize
  if (!SD.begin(spi_ss, SPI_EXT)) {
    M5.Lcd.println("Card Mount Failed");
    return;
  }
  // SD check
  uint8_t cardType = SD.cardType();
  if (cardType == CARD_NONE) {
    M5.Lcd.println("None SD Card");
    return;
  }
  M5.Lcd.print("SD Card Type: ");
  if (cardType == CARD_MMC) {
    M5.Lcd.println("MMC");
  } else if (cardType == CARD_SD) {
    M5.Lcd.println("SDSC");
  } else if (cardType == CARD_SDHC) {
    M5.Lcd.println("SDHC");
  } else {
    M5.Lcd.println("UNKNOWN");
  }
  // SD volume
  uint64_t cardSize = SD.cardSize() / (1024 * 1024);
  M5.Lcd.printf("SD Card Size: %lluMB\n", cardSize);
}
void loop() {
}

Please help a beginer me.

I tried to set up my M5StickC Plus can read micro SD card.
However, it didn't work.
"Card Mount Failed" was displayed.

This is the connection and my code.

M5StickCPlus >>>> SD card shield module
3V3 >>>> 3V3
GND >>>> GND
0 >>>> CLK
26 >>>> MISO
32 >>>> MOSI
33 >>>> CS

// referred to below
// https://lang-ship.com/blog/work/m5stickc-spi-sd/
#include <M5StickCPlus.h>
#include "SD.h"
// PIN assign
enum { spi_sck = 0, spi_miso = 26, spi_mosi = 32, spi_ss = 33 };
void setup()
{
  // M5Stick initialize
  M5.begin();
  M5.Lcd.setRotation(3);
  // SPI initialize
  SPI.begin(spi_sck, spi_miso, spi_mosi, spi_ss);
  // SD card initialize
  if (!SD.begin(spi_ss)) {
    M5.Lcd.println("Card Mount Failed");
    return;
  }
  // SD card classification
  uint8_t cardType = SD.cardType();
  if (cardType == CARD_NONE) {
    M5.Lcd.println("None SD Card");
    return;
  }
  M5.Lcd.print("SD Card Type: ");
  if (cardType == CARD_MMC) {
    M5.Lcd.println("MMC");
  } else if (cardType == CARD_SD) {
    M5.Lcd.println("SDSC");
  } else if (cardType == CARD_SDHC) {
    M5.Lcd.println("SDHC");
  } else {
    M5.Lcd.println("UNKNOWN");
  }
  // SD card volume
  uint64_t cardSize = SD.cardSize() / (1024 * 1024);
  M5.Lcd.printf("SD Card Size: %lluMB\n", cardSize);
}
void loop() {
}

Perhaps, the issue caused by SD.begin(spi_ss).
Maybe it returned false everytime.
But I have no idea for fix it.
Give me a clue please.

PS.
the SD card and SD card shield I use are below.
but, not only these, also I used any other I have, and same result.

• micro SD card
  KIOXIA KLMEA016G
  https://www.amazon.co.jp/dp/B08PTP6KKS?ref=ppx_pop_dt_b_product_details&th=1
• SD card shield module
  VKLSVAN Micro SD TF SPI card memory shield module
  https://www.amazon.co.jp/dp/B086WV4VG9?psc=1&ref=ppx_pop_dt_b_product_details