Automated External Hard Drive Backup

Hi,
I'm trying to automatize my backups from a 'A' Hard Drive (DATA) to a 'B' Hard Drive (Backup EXT) using Hazel and the 'rsync' command. I want it to be triggered when both are mounted on 'Volumes'.
After some research, I came up with that, but before to execute it, I would like to make sure this is correct.
Those Data are very valuable, since it's my 7+ Years of photo and video works...
Thank you

I'm trying to automatize my backups from a 'A' Hard Drive (DATA) to a 'B' Hard Drive (Backup EXT) using Hazel and the 'rsync' command. I want it to be triggered when both are mounted on 'Volumes'.
After some research, I came up with that, but before to execute it, I would like to make sure this is correct.
Those Data are very valuable, since it's my 7+ Years of photo and video works...
Thank you

