I have a new HP M425 digital camera. I want to find the compatible Secure Disk not HP to buy over the counter.

Circuit City looks to have a Scandisc 512 MB SD $30 (after instant savings) and $19.99 after $11 mail in rebate. Even at $30 it is a pretty good deal.

If you are willing to order online though, you can get a 1 GB Scandisc or Kingston for around $30.

Plenty of other brands make SD cards and all of them will work in your camera. I can personally recommend the brand SanDisk. Their '512MB Ultra ll SD-card' should be just right for your camera. It costs about $50.