Delete and sync files periodically?

My Cloud OS 3 Personal & Network Attached Storage My Cloud
1

I’ve the WD My Cloud 2GB and save thousands of images to the drive with an IP web cam Axis 207W.

I’ve been redaing, that SSH is available and now I need to know how to setup a DEL-Job (all files older than 30days) and ideally an rsync to a cloud storage (dropbox)? Is there any guideline with details?

2

The following command will delete files older than 30 days

find /path/to/files/ -mtime +30 -exec rm -rf {} ;

AWAYS TEST ON A DUMMY FOLDER/FILES FIRST!

3

where to store this line of code and how to start the code every day?

EDIT: this is what I found…

1.) connect to WD via SSH and Windows tool WinSCP

2.) place file with code unter /usr/local/sbin and name the file *.sh

3.) add file to crontab line under /etc/crontab

=> is that correct?