Buffalo seems to have a pretty nice setup for external storage and now they are offering an AES-capable utility. I like their cartoon that explains why you need encryption, or “SecureLockWare” as they call it, and the fact that you can download the software for free. Appears to do whole disk as well as file and folder.

Now, if I could just find a vendor that offered a fire-proof external case for four SATA drives in RAID (one “hot” spare, ha) with a combo lock latch, all of which can be bolted to the concrete floor…