My SAM 440 I just have a quick and dirty script that runs via a crontab event every 48 hours.
Copies the entire contents of the 32 GB (SYS: is 10 GB, BBS: is 20 GB roughly) SATA SSD to a SAMBA share on a Windows 2003 server box.
While I'd like to patch together an incremental solution to this, the way I have it now takes no time at all, but an incremental way to do it would keep the IO and network traffic down.