I download images from my camera using the supplied adaptor plugged into the front USB socket on my Iyonix. The instructions say to plug and unplug from the camera while it is turned off, so after downloading, I always dismount the drive, then switch off the camera, then unplug. I recently installed USB2, and that procedure no longer works. The camera won't switch off while connected to the computer. If I turn off the computer then it will, but that never used to be necessary. I tried unplugging the USB lead from the Iyonix, which turned the camera off, but gave me a real scare when it wouldn't turn on again until I took out the battery and replaced it. Why does USB2 behave like this? It must be doing something that the camera interprets as an operation in progress, and therefore waits. I am running RO 5.11 John -- John Harrison - using a British Iyonix PC running RISC-OS 5 http://www.jaharrison.me.uk --- To alter your preferences or leave the group, visit //www.freelists.org/list/iyonix-support Other info via //www.freelists.org/webpage/iyonix-support