diff --git a/backup.sh b/backup.sh
index 1559bdb..4eb33b9 100755
--- a/backup.sh
+++ b/backup.sh
@@ -54,8 +54,8 @@ if [ ! -z $CARD_READER ]; then
   sudo sh -c "echo 500 > /sys/class/leds/led0/delay_on"
   # Create  a .id random identifier file if doesn't exist
   if [ ! -f $CARD_MOUNT_POINT/*.id ]; then
-    ID=$RANDOM 
-    touch $ID."id"
+    ID=$(date -d "today" +"%Y%m%d%H%M").id 
+    touch $ID
   else
     ID_FILE=$(ls *.id)
     ID="${ID_FILE%.*}"