Hi,

in order to backing up data when I connect to computer an USB HD, I wrote the follow UDEV rule :

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SUBSYSTEM=="block", ACTION=="add", ATTRS{vendor}=="152d", ATTRS{model}=="0578",  SYMLINK+="external%n", RUN+="/usr/bin/mrs-auto_backup.sh"

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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.

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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