Well, I just upgraded my backup system for photo storage, so I thought i'd find out what you all are using now.
At first I didn't back up. Then after losing some cruise photos about 5 years ago, I bought an external hard drive and never looked back. It was a 40GB USB maxtor.
More recently I needed more, so I bought a 300GB maxtor One Touch II USB/FireWire HD, which I now use on my macbook Pro using a program called SuperDuper, which not only automatically transfers and/or updates files using your custom parameters, but can actually make a bootable clone of your internal hard drive.
This week I received the FirmTek dual-bay hot swappable 2EN2 SATA3Gbps/ eSATA hard drive enclosure. it is extremely well built, with selectable speed fan, dual bays with lockable drive trays, SATA 3Gbps internal interface and eSATA 3Gbps external interface. On the computer side I have their 2SM2-E Expresscard/34 with eSATA interface. BareFeats benchmarked it several times faster than FireWire or USB, and almost twice as fast again with a RAID 0 array. I'll probably be using it as RAID 1 or just two independent disks until I can afford a second set of drives for it, at which point I'll go for a RAID 0 set with each pair of drives.
I currently have purchased two WD Caviar SE16 250GB 7200RPM 16MB cache drives to go in it.
So what do YOU use to safeguard your data?