Hi, there's a 1024kb file size limit, can I assume you're operating on Windows? If you right-click on your pics that you want to upload, then open them in Paint, you can resize them in there. Go to the Image option on the upper taskbar, select Attributes then you can see what size your pics are.
If you then go to Image again, then select the Resize/Skew option, you can resize your pics as a percentage of the original size, e.g. 50% smaller.