My first guess would be you are trying to copy to a nearly full hard/SSD/USB drive and there isn't sufficient space available to complete the copy operation.
Idea #2 is that whatever software that is being used for your camera isn't capable of handling files from your camera. This happens to a number of people that upgrade to the latest, best-est, greatest camera shortly after the camera comes to market and the software they are using hasn't been updated to deal with the slightly different file format of the new camera. Photo editing software from most vendors is perhaps 1-2 months from camera-on-the-street to their products support that new camera. If this is the situation, update your editing software to accommodate the new camera.
Idea #3 is the flip-side of #2...the operating system of your laptop doesn't correctly support your camera...ie, the device driver for your camera isn't available yet in, say, Windows 8.1. If that's the case, try doing an update on Windows.
If none of the above, please post information regarding what camera, computer operating system, and photo downloading / editing software you are using, and the exact text of the message being displayed and the program that displayed it.