SanDisk Introduces Non-Erasable SD Cards

SanDisk has come out with a write-once, read-many (WORM) SD memory card for cameras. Given the format, I think it's clearly taking aim at the prosumer and professional markets. Why would you want a card that would only record and never let you erase or modify an image? A couple of reasons come to mind. One, mentioned by the Engadget post, is in situations - law enforcement, legal uses - where you want to "prove" that the contents could not have changed. But there's another: when you are shooting something critical and you want to ensure that you've minimized the chances of losing data. Grant you, that would be seldom, as immediately dumping the contents onto one of those standalone back-up drives is generally enough, but when you want both the best and suspenders for peace of mind, it's nice to be able to get them both.