I never liked incremental backups on the Amiga simply because the data isn't that big comparing it to a PC full of software and games, making it rather easy to fully backup it up.
Especially when the System partition along with almost every useful program most of times don't go beyond 500MB.
If you just keep a System partition with only the system and patches etc, then a lot smaller backup is needed.
I always used:
1> dh0:
1> lha a -aezrx DH1:System_Backup.lha #?
(for compressing the data although it takes more time just replace the "z" with "Z")
