diff --git a/Source/Core/Common/SDCardUtil.cpp b/Source/Core/Common/SDCardUtil.cpp
index d57a43fb9d..5719c1552f 100644
--- a/Source/Core/Common/SDCardUtil.cpp
+++ b/Source/Core/Common/SDCardUtil.cpp
@@ -177,12 +177,12 @@ static void fat_init(u8* fat)
   POKEW(fat + 8, 0x0fffffff); /* End of cluster chain for root dir */
 }
 
-static unsigned int write_sector(FILE* file, u8* sector)
+static bool write_sector(FILE* file, const u8* sector)
 {
-  return fwrite(sector, 1, BYTES_PER_SECTOR, file) != BYTES_PER_SECTOR;
+  return fwrite(sector, 1, BYTES_PER_SECTOR, file) == BYTES_PER_SECTOR;
 }
 
-static unsigned int write_empty(FILE* file, u64 count)
+static bool write_empty(FILE* file, u64 count)
 {
   static u8 empty[64 * 1024];
 
@@ -194,11 +194,11 @@ static unsigned int write_empty(FILE* file, u64 count)
       len = count;
 
     if (fwrite(empty, 1, (size_t)len, file) != (size_t)len)
-      return 1;
+      return false;
 
     count -= len;
   }
-  return 0;
+  return true;
 }
 
 bool SDCardCreate(u64 disk_size /*in MB*/, const std::string& filename)
@@ -245,45 +245,45 @@ bool SDCardCreate(u64 disk_size /*in MB*/, const std::string& filename)
    *  zero sectors
    */
 
-  if (write_sector(f, s_boot_sector))
+  if (!write_sector(f, s_boot_sector))
     goto FailWrite;
 
-  if (write_sector(f, s_fsinfo_sector))
+  if (!write_sector(f, s_fsinfo_sector))
     goto FailWrite;
 
   if (BACKUP_BOOT_SECTOR > 0)
   {
-    if (write_empty(f, BACKUP_BOOT_SECTOR - 2))
+    if (!write_empty(f, BACKUP_BOOT_SECTOR - 2))
       goto FailWrite;
 
-    if (write_sector(f, s_boot_sector))
+    if (!write_sector(f, s_boot_sector))
       goto FailWrite;
 
-    if (write_sector(f, s_fsinfo_sector))
+    if (!write_sector(f, s_fsinfo_sector))
       goto FailWrite;
 
-    if (write_empty(f, RESERVED_SECTORS - 2 - BACKUP_BOOT_SECTOR))
+    if (!write_empty(f, RESERVED_SECTORS - 2 - BACKUP_BOOT_SECTOR))
       goto FailWrite;
   }
   else
   {
-    if (write_empty(f, RESERVED_SECTORS - 2))
+    if (!write_empty(f, RESERVED_SECTORS - 2))
       goto FailWrite;
   }
 
-  if (write_sector(f, s_fat_head))
+  if (!write_sector(f, s_fat_head))
     goto FailWrite;
 
-  if (write_empty(f, sectors_per_fat - 1))
+  if (!write_empty(f, sectors_per_fat - 1))
     goto FailWrite;
 
-  if (write_sector(f, s_fat_head))
+  if (!write_sector(f, s_fat_head))
     goto FailWrite;
 
-  if (write_empty(f, sectors_per_fat - 1))
+  if (!write_empty(f, sectors_per_fat - 1))
     goto FailWrite;
 
-  if (write_empty(f, sectors_per_disk - RESERVED_SECTORS - 2 * sectors_per_fat))
+  if (!write_empty(f, sectors_per_disk - RESERVED_SECTORS - 2 * sectors_per_fat))
     goto FailWrite;
 
   return true;