Backup too big, is there a way to download it through "resume download"

You see, the backup file is usually several G.

Too big to download, maybe need 10hours.

So it should support download resume from Breakpoint.

I have downloaded my backup file 2 times, but the network is not so steady and failed either these 2 times.

You could download the backup via SFTP from your server. It allows resume. If you are on Windows, a client like WinSCP will allow you to resume the download. Backups are usually stored in /var/discourse/shared/standalone/backups/default