UDEV RULES

Hi, in order to backing up data when I connect to computer an USB HD, I wrote the follow UDEV rule : ------------------------------------------------------------------ SUBSYSTEM=="block", ACTION=="add", ATTRS{vendor}=="152d", ATTRS{model}=="0578", SYMLINK+="external%n", RUN+="/usr/bin/mrs-auto_backup.sh" ------------------------------------------------------------------- the rule is the content of the file :* /etc/udev/rules.d/10.autobackup.rules * that I self created . I learned this method at the link : https://www.tecmint.com/auto-backup-files-to-usb-media-in-linux/ *("How to backup files to USB media when connected*") As well I tried in many different combinations and parameters values, never I was able to execute the script inside the rule. ----- In order to get the USB HD characteristic of the USB Hard Disk to use for backing-up the data I used the command : *<sudo udevadm info -q all -n /dev/sdc>* and its output is transcribed below Could someone help me to understand because this rule doesn't works ? thank you regards Angelo ------------------- *features (attributes) of the USB Hrd Disk that I got with the above command *: [angelo_dev@localhost ~]$ sudo udevadm info -q all -n /dev/sdc *P: /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5.1/3-5.1.2/3-5.1.2:1.0/host6/target6:0:0/6:0:0:0/block/sdcN: sdcL: 0S: externalS: disk/by-path/pci-0000:00:14.0-usb-0:5.1.2:1.0-scsi-0:0:0:0S: disk/by-id/usb-JMicron_Tech_DB12345681BC-0:0E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5.1/3-5.1.2/3-5.1.2:1.0/host6/target6:0:0/6:0:0:0/block/sdcE: DEVNAME=/dev/sdcE: DEVTYPE=diskE: MAJOR=8E: MINOR=32E: SUBSYSTEM=blockE: USEC_INITIALIZED=11404758453E: ID_VENDOR=JMicronE: ID_VENDOR_ENC=JMicron\x20E: ID_VENDOR_ID=152dE: ID_MODEL=TechE: ID_MODEL_ENC=Tech\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20\x20E: ID_MODEL_ID=0578E: ID_REVISION=0203E: ID_SERIAL=JMicron_Tech_DB12345681BC-0:0E: ID_SERIAL_SHORT=DB12345681BCE: ID_TYPE=diskE: ID_INSTANCE=0:0E: ID_BUS=usbE: ID_USB_INTERFACES=:080650:080662:E: ID_USB_INTERFACE_NUM=00E: ID_USB_DRIVER=uasE: ID_PATH=pci-0000:00:14.0-usb-0:5.1.2:1.0-scsi-0:0:0:0E: ID_PATH_TAG=pci-0000_00_14_0-usb-0_5_1_2_1_0-scsi-0_0_0_0E: ID_PART_TABLE_UUID=0007fd62E: ID_PART_TABLE_TYPE=dosE: DEVLINKS=/dev/external /dev/disk/by-path/pci-0000:00:14.0-usb-0:5.1.2:1.0-scsi-0:0:0:0 /dev/disk/by-id/usb-JMicron_Tech_DB12345681BC-0:0E: TAGS=:systemd:*