Hi,
I understood that you need to backup your application/data from your server via a software/script. I propose below options.
Upload backup to aws s3, it is most reliable, secure and cheap cloud storage available. It will cost you $0.007 per GB.
I can prepare a script and automate if it's a linux os. If it's windows I can prepare a software which will backup on click.
Please ping me for more details.
Regards,
Prithvi