individual pix are limited to 300kb. There are apps available for resizing images to a more manageable size for website postings, but many are cumbersome. I use (on iPads) an app called "Image Compress & Resize Easily" from the App Store, but there are others. I like it because it has a simple slider so I can tell just how big the final image will be and can easily set it at 250-290kb. I'm not sure what's out there now for Windows/Android.
Some years ago Steve and I created a guide for users here. Go to Home, scroll down to Forum Assistance (Members Only), and the Guide is at the top of the list.
Joel