diff --git a/Cart_Reader/SNES.ino b/Cart_Reader/SNES.ino
index 9782039..58ffbe3 100644
--- a/Cart_Reader/SNES.ino
+++ b/Cart_Reader/SNES.ino
@@ -384,8 +384,8 @@ void snesMenu() {
         // Change working dir to root
         sd.chdir("/");
         readSRAM();
-        eraseSRAM(0x00);
-        eraseSRAM(0xFF);
+        eraseSRAM(0x0F);
+        eraseSRAM(0xF0);
         writeSRAM(0);
         unsigned long wrErrors = verifySRAM();
         if (wrErrors == 0) {
@@ -1655,9 +1655,20 @@ void writeSRAM(boolean browseFile) {
       // Writing SRAM on HiRom needs CS(PH3) to be high
       PORTH |= (1 << 3);
       // Sram size
-      long lastByte = (long(sramSize) * 128) + 0x6000;
-      for (long currByte = 0x6000; currByte < lastByte; currByte++) {
-        writeBank_SNES(0xB0, currByte, myFile.read());
+      long lastByte = (long(sramSize) * 128);
+      if (lastByte > 0x2000) {  // Large EX SRAM Fix
+        sramBanks = lastByte / 0x2000;
+        for (int currBank = 0xB0; currBank < sramBanks + 0xB0; currBank++) {
+          for (long currByte = 0x6000; currByte < 0x8000; currByte++) {
+            writeBank_SNES(currBank, currByte, myFile.read());
+          }
+        }
+      } else {
+        lastByte += 0x6000;
+        // Write to sram bank
+        for (long currByte = 0x6000; currByte < lastByte; currByte++) {
+          writeBank_SNES(0xB0, currByte, myFile.read());
+        }
       }
     }
     // SA1
@@ -1809,9 +1820,19 @@ void readSRAM() {
     // Dumping SRAM on HiRom needs CS(PH3) to be high
     PORTH |= (1 << 3);
     // Sram size
-    long lastByte = (long(sramSize) * 128) + 0x6000;
-    for (long currByte = 0x6000; currByte < lastByte; currByte++) {
-      myFile.write(readBank_SNES(0xB0, currByte));
+    long lastByte = (long(sramSize) * 128);
+    if (lastByte > 0x2000) {  // Large EX SRAM Fix
+      sramBanks = lastByte / 0x2000;
+      for (int currBank = 0xB0; currBank < sramBanks + 0xB0; currBank++) {
+        for (long currByte = 0x6000; currByte < 0x8000; currByte++) {
+          myFile.write(readBank_SNES(currBank, currByte));
+        }
+      }
+    } else {
+      lastByte += 0x6000;
+      for (long currByte = 0x6000; currByte < lastByte; currByte++) {
+        myFile.write(readBank_SNES(0xB0, currByte));
+      }
     }
   } else if (romType == SA) {
     // Dumping SRAM on HiRom needs CS(PH3) to be high
@@ -1964,13 +1985,29 @@ unsigned long verifySRAM() {
       // Dumping SRAM on HiRom needs CS(PH3) to be high
       PORTH |= (1 << 3);
       // Sram size
-      long lastByte = (long(sramSize) * 128) + 0x6000;
-      for (long currByte = 0x6000; currByte < lastByte; currByte += 512) {
-        //fill sdBuffer
-        myFile.read(sdBuffer, 512);
-        for (int c = 0; c < 512; c++) {
-          if ((readBank_SNES(0xB0, currByte + c)) != sdBuffer[c]) {
-            writeErrors++;
+      long lastByte = (long(sramSize) * 128);
+      if (lastByte > 0x2000) {  // Large EX SRAM Fix
+        sramBanks = lastByte / 0x2000;
+        for (int currBank = 0xB0; currBank < sramBanks + 0xB0; currBank++) {
+          for (long currByte = 0x6000; currByte < 0x8000; currByte += 512) {
+            //fill sdBuffer
+            myFile.read(sdBuffer, 512);
+            for (int c = 0; c < 512; c++) {
+              if ((readBank_SNES(currBank, currByte + c)) != sdBuffer[c]) {
+                writeErrors++;
+              }
+            }
+          }
+        }
+      } else {
+        lastByte += 0x6000;
+        for (long currByte = 0x6000; currByte < lastByte; currByte += 512) {
+          //fill sdBuffer
+          myFile.read(sdBuffer, 512);
+          for (int c = 0; c < 512; c++) {
+            if ((readBank_SNES(0xB0, currByte + c)) != sdBuffer[c]) {
+              writeErrors++;
+            }
           }
         }
       }
@@ -2121,10 +2158,21 @@ boolean eraseSRAM(byte b) {
   else if (romType == EX) {
     // Writing SRAM on HiRom needs CS(PH3) to be high
     PORTH |= (1 << 3);
-    // Sram size
-    long lastByte = (long(sramSize) * 128) + 0x6000;
-    for (long currByte = 0x6000; currByte < lastByte; currByte++) {
-      writeBank_SNES(0xB0, currByte, b);
+    /// Sram size
+    long lastByte = (long(sramSize) * 128);
+    if (lastByte > 0x2000) {  // Large EX SRAM Fix
+      sramBanks = lastByte / 0x2000;
+      for (int currBank = 0xB0; currBank < sramBanks + 0xB0; currBank++) {
+        for (long currByte = 0x6000; currByte < 0x8000; currByte++) {
+          writeBank_SNES(currBank, currByte, b);
+        }
+      }
+    } else {
+      lastByte += 0x6000;
+      // Write to sram bank
+      for (long currByte = 0x6000; currByte < lastByte; currByte++) {
+        writeBank_SNES(0xB0, currByte, b);
+      }
     }
   }
   // SA1
@@ -2281,11 +2329,25 @@ boolean eraseSRAM(byte b) {
     // Dumping SRAM on HiRom needs CS(PH3) to be high
     PORTH |= (1 << 3);
     // Sram size
-    long lastByte = (long(sramSize) * 128) + 0x6000;
-    for (long currByte = 0x6000; currByte < lastByte; currByte += 512) {
-      for (int c = 0; c < 512; c++) {
-        if ((readBank_SNES(0xB0, currByte + c)) != b) {
-          writeErrors++;
+    long lastByte = (long(sramSize) * 128);
+    if (lastByte > 0x2000) {  // Large EX SRAM Fix
+      sramBanks = lastByte / 0x2000;
+      for (int currBank = 0xB0; currBank < sramBanks + 0xB0; currBank++) {
+        for (long currByte = 0x6000; currByte < 0x8000; currByte += 512) {
+          for (int c = 0; c < 512; c++) {
+            if ((readBank_SNES(currBank, currByte + c)) != b) {
+              writeErrors++;
+            }
+          }
+        }
+      }
+    } else {
+      lastByte += 0x6000;
+      for (long currByte = 0x6000; currByte < lastByte; currByte += 512) {
+        for (int c = 0; c < 512; c++) {
+          if ((readBank_SNES(0xB0, currByte + c)) != b) {
+            writeErrors++;
+          }
         }
       }
     }