Make sure there is no TF card in the camera. Otherwise computer will define it as USB disk if camera has TF card. We ensure all products we sell are 100% brand new.We ensure will handle every message carefully & fix every problem properly. The item "37MP TV HDMI USB Industry Digital C-mount Microscope Camera+30mm/30.5mm adapter" is in sale since Friday, July 26, 2019. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Medical & Lab Equipment, Devices\Microscopes". The seller is "honey543" and is located in Shen Zhen. This item can be shipped worldwide.