Sorry if this has been posted before, If so please go ahead and delete post. I have seen people ask about installing the memory cards into the Dahua cameras since trying to push the memory card into the slot takes quite a bit of force, the 1st few i did i was afraid i was doing something possibly wrong. I just received 5 of the new 4231emp-ase cams from Andy ( Thanks Andy) The 1st one i went to install the memory card into was not going in easy then my finger slipped and the frame for the card flipped open, I thought i had broke it. It actually slides to open, you set card in place and close the frame and slide it to lock in. I have only purchased Dahua cams this year as replacements so i don't know if this is a change on the newer cams or if the older one's did this also. I made a video to show how to do it if it will help anyone with installing the memory cards.