If you can't exclude any table from your backup archive, I suggest you to change your backup type to All configured databases.
In that way Akeeba Backup will produce an archive file, with a smaller size. If it's too large, you can easily split it into smaller files using the Part Size option. Please note that if the backup type is All configured databases, you won't have a SQL file, but a JPA or ZIP, with the ANGIE restoration script inside it.
Davide Tampellini
Developer and Support Staff
🇮🇹Italian: native 🇬🇧English: good • 🕐 My time zone is Europe / Rome (UTC +1)
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!