Error Uploading Large Images

Hi,

When I try to upload large images to my site (6000 x 4000 pixels, ~9Mb) I get an error about the images being too large and I have to reduce the size to get them to upload.

I’ve checked my Media Library and it says it has a Maximum upload file size of 512 MB, and in the settings for media uploads I have the large size max width and height both set to 10000 (I’ve also tried setting the medium to this as well).

Is there a way I can upload these large images to my site without having to resize first? I run a multi-author website so I don’t want my contributors to have to mess around resizing images before uploading, ideally I want them to be able to just upload as they are and then I use Smush or another plugin to compress and optimise them once uploaded.

Thanks