Backup my Google Cloud account!

I need my website's files, and database to be backed up and uploaded to a private online source for download. If you do not know how to backup from a google cloud account don't bid on this please!! I do have cpanel and that would be fine as well! Simple job, my internet just is not good enough and the files and database is rather large, total of approx 500gb. It has been taking me usually 12 hours with my horrible internet.. Which is why I am looking to hire you!