diff --git a/ios_mcp/source/options/ShowExtCsd.c b/ios_mcp/source/options/ShowExtCsd.c
index dcee99e..606f140 100644
--- a/ios_mcp/source/options/ShowExtCsd.c
+++ b/ios_mcp/source/options/ShowExtCsd.c
@@ -34,9 +34,6 @@ void option_ShowExtCsd(void)
         return;
     }
 
-    // Lock blkdrv so it won't interfere with our custom commands
-    MDBlkDrv_Lock(fsaHandle, blkDrvIndex);
-
     uint8_t* ext_csd = (uint8_t*) IOS_HeapAllocAligned(CROSS_PROCESS_HEAP_ID, 0x200, 0x20);
     if (!ext_csd) {
         gfx_set_font_color(COLOR_ERROR);
@@ -44,6 +41,10 @@ void option_ShowExtCsd(void)
         waitButtonInput();
         return;
     }
+
+    // Lock blkdrv so it won't interfere with our custom commands
+    MDBlkDrv_Lock(fsaHandle, blkDrvIndex);
+
     gfx_print(16, index, 0, "Submitting command...");
     index += CHAR_SIZE_DRC_Y + 4;
 
@@ -70,35 +71,35 @@ void option_ShowExtCsd(void)
 
     uint8_t ext_csd_rev = ext_csd[192];
     const char* str;
-	switch (ext_csd_rev) {
-	case 8:
-		str = "5.1";
-		break;
-	case 7:
-		str = "5.0";
-		break;
-	case 6:
-		str = "4.5";
-		break;
-	case 5:
-		str = "4.41";
-		break;
-	case 3:
-		str = "4.3";
-		break;
-	case 2:
-		str = "4.2";
-		break;
-	case 1:
-		str = "4.1";
-		break;
-	case 0:
-		str = "4.0";
-		break;
-	default:
-		str = "Invalid revision";
+    switch (ext_csd_rev) {
+    case 8:
+        str = "5.1";
+        break;
+    case 7:
+        str = "5.0";
         break;
-	}
+    case 6:
+        str = "4.5";
+        break;
+    case 5:
+        str = "4.41";
+        break;
+    case 3:
+        str = "4.3";
+        break;
+    case 2:
+        str = "4.2";
+        break;
+    case 1:
+        str = "4.1";
+        break;
+    case 0:
+        str = "4.0";
+        break;
+    default:
+        str = "Invalid revision";
+        break;
+    }
 
     gfx_printf(16, index, 0, "Extended CSD rev 1.%d (MMC %s)", ext_csd_rev, str);
     index += CHAR_SIZE_DRC_Y + 4;
@@ -106,14 +107,14 @@ void option_ShowExtCsd(void)
     gfx_printf(16, index, 0, "S_CMD_SET: 0x%02x", ext_csd[504]);
     index += CHAR_SIZE_DRC_Y + 4;
 
-	gfx_printf(16, index, 0, "BKOPS_SUPPORT: 0x%02x", ext_csd[502]);
+    gfx_printf(16, index, 0, "BKOPS_SUPPORT: 0x%02x", ext_csd[502]);
     index += CHAR_SIZE_DRC_Y + 4;
 
-	if (ext_csd_rev >= 5) {
-		gfx_printf(16, index, 0, "BKOPS_EN: 0x%02x", ext_csd[163]);
+    if (ext_csd_rev >= 5) {
+        gfx_printf(16, index, 0, "BKOPS_EN: 0x%02x", ext_csd[163]);
         index += CHAR_SIZE_DRC_Y + 4;
 
-		gfx_printf(16, index, 0, "BKOPS_STATUS: 0x%02x", ext_csd[246]);
+        gfx_printf(16, index, 0, "BKOPS_STATUS: 0x%02x", ext_csd[246]);
         index += CHAR_SIZE_DRC_Y + 4;
     }