diff --git a/idd.sh b/idd.sh
index 0015042..ede031b 100755
--- a/idd.sh
+++ b/idd.sh
@@ -127,7 +127,7 @@ case "$1" in
      echo
      printf "${LCYAN}Please wait ...${NC}\n"
      echo
-     pv -tpreb ${filepath} | dd bs=4M of=${DEVICEDIR}/${devname}
+     pv -tpreb ${filepath} | dd bs=1M of=${DEVICEDIR}/${devname}
      echo
      printf "${YELLOW}Syncing buffers...${NC}\n";sync
      echo
@@ -180,7 +180,7 @@ case "$1" in
       echo
       printf "${LCYAN}Please wait ...${NC}\n"
       echo
-      pv -tpreb ${filepath} | dd bs=4M of=${DEVICEDIR}/${devname}
+      pv -tpreb ${filepath} | dd bs=1M of=${DEVICEDIR}/${devname}
       echo
       printf "${YELLOW}Syncing buffers...${NC}\n";sync
       echo