Hi all, just took delivery of my Q500 4k and have a major problem. When shooting stills all is fine but when shooting videoI I was getting glitches but now not even that just corrupt files. It appears that the controller is saying that the video is switched off but the camera is still recording???? The only way to stop it is to switch off, which gives me the corrupt file and switch back on again to make it readable albeit with the wrong date and time stamp. The original 16gb card now seems to be working ok indoors, not tried it outside with all the vibrations etc but a new Scandisk extreme is doing the same thing, ie switching in but not switching off!!! Any help would be great. Thanks.