For copying stuff from camera cards I just use the Apple Camera connection kit. airstash is way overkill if that's your use case. But if you want to use sd cards for storing other stuff, then it makes sense. I went the goflex satellite route for bulk media storage. But where I occasionally get stuck is dealing with USB sticks. I am often in training seminars and the courseware invariably gets passed around on a USB stick. If I could copy arbitrary files off a USB stick I could leave my laptop at home, but neither the goflex satellite, the airstash, nor the camera connection kit will give me access to a USB stick.