I haven't posted anything with pictures for a while and cannot get it to happen. A single picture is around 523 KB I seem to remember there is a trick to it. Could someone give me a specific step by step procedure, please?

I go to post pictures, hit "Select files", click "Add files", click "done adding files", hit "Upload pictures" Sends me back to "select files" window. Get an error message that says my file size is too large.