diff --git a/backup.sh b/backup.sh
index 44de230..0a7a038 100755
--- a/backup.sh
+++ b/backup.sh
@@ -52,18 +52,17 @@ if [ ! -z $CARD_READER ]; then
   mount /dev/$CARD_DEV $CARD_MOUNT_POINT
   # # Set the ACT LED to blink at 500ms to indicate that the card has been mounted
   sudo sh -c "echo 500 > /sys/class/leds/led0/delay_on"
-  # Create the CARD_ID file containing a random 8-digit identifier if doesn't exist
-  if [ ! -f $CARD_MOUNT_POINT/CARD_ID ]; then
-    < /dev/urandom tr -cd 0-9 | head -c 8 > $CARD_MOUNT_POINT/CARD_ID
+  # Create  a .id random identifier file if doesn't exist
+  if [ ! -f $CARD_MOUNT_POINT/*.id ]; then
+    ID=$RANDOM 
+    touch $ID."id"
   fi
 
+# Set the backup path
+BACKUP_PATH=$STORAGE_MOUNT_POINT/"$ID"
+
 # Log the output of the lsblk command for troubleshooting
 sudo lsblk > lsblk.log
-
-# Read the 8-digit identifier number from the CARD_ID file on the card
-# and use it as a directory name in the backup path
-read -r ID < $CARD_MOUNT_POINT/CARD_ID
-BACKUP_PATH=$STORAGE_MOUNT_POINT/"$ID"
   
 # Perform backup using rsync
 rsync -avh $CARD_MOUNT_POINT/ $BACKUP_PATH