You can set your own parallel file downloads limit. By default BackupSheep servers only make 3 connections when downloading your files. However you can set this limit between 1 to 100. This can significantly increase backup speed.
Please note that increase in number of parallel downloads may trigger firewall rules in your FTP/SFTP server and it may block our IP (188.8.131.52/32). Higher parallel download connections can also lead to high load on your server.