diff --git a/Ventoy2Disk/Ventoy2Disk/ff14/source/diskio.c b/Ventoy2Disk/Ventoy2Disk/ff14/source/diskio.c
index d45df97d..bb53ee27 100644
--- a/Ventoy2Disk/Ventoy2Disk/ff14/source/diskio.c
+++ b/Ventoy2Disk/Ventoy2Disk/ff14/source/diskio.c
@@ -228,6 +228,7 @@ DRESULT disk_write (
             return RES_OK;
         }
 
+        buff += 512;
         sector++;
         count--;
     }