"SDMMC on Portenta H7 does not recover after a hot-plug removal."

[SAMRUTK]

i am using the sd card on portenta breakout board using the Portenta H7 however "SDMMC on Portenta H7 does not recover after a hot-plug removal." I am using the following code..
#include <SdFat.h>

// For Portenta + Mid/Breakout Carrier, SD is on the built-in SDMMC slot.
SdFat SDFS;

#define ERROR_LED LEDR // Use the built-in Red LED

// Helper to control the LED (LOW = ON for Portenta)
void ERROR_LED_SET(bool on) {
digitalWrite(ERROR_LED, on ? LOW : HIGH);
}

/**

• @brief (Final Hot-Plug Fix) Verifies card presence by checking card type
• IMMEDIATELY after initialization to defeat "ghost" initializations.
  */
  bool ensureSdReady() {
  // This function now performs a mandatory two-step check because SDFS.begin()
  // on its own can be unreliable on this hardware after a card removal.

// Step 1: Attempt to initialize the card.
if (!SDFS.begin()) {
// This is a clear and reliable failure. The card is definitely not present.
ERROR_LED_SET(true);
return false;
}

// Step 2: VERIFY the initialization.
// After a "successful" begin(), we immediately check the card's hardware type.
// A real card will have a type like SD_CARD_TYPE_SDHC.
// A "ghost" initialization on empty pins will return a type of 0.
if (SDFS.card()->type() == 0) {
// This is the critical check. begin() gave a false positive.
ERROR_LED_SET(true);
return false;
}

// If we get here, begin() succeeded AND the card reported a valid hardware type.
ERROR_LED_SET(false);
return true;
}

void setup() {
Serial.begin(115200);
while (!Serial && millis() < 3000);

pinMode(ERROR_LED, OUTPUT);
digitalWrite(ERROR_LED, HIGH); // Turn LED OFF

Serial.println("\n--- Portenta H7 Final SD Card Hot-Plug Test ---");
Serial.println("This version uses two-step verification to prevent false detections.\n");
}

void loop() {
Serial.println("--- Starting Check ---");
if (ensureSdReady()) {
if (SDFS.exists("testfile.txt")) {
Serial.println("Result: Card is PRESENT and 'testfile.txt' was FOUND.\n");
} else {
Serial.println("Result: Card is PRESENT but 'testfile.txt' was NOT FOUND.\n");
}
} else {
Serial.println("Result: Card is NOT ready or was removed.\n");
}

delay(3000);
}