Hi Steve, max hight/width defines the image dimensions. I set them to 1000x1000. Depending on the quality (is that the jpeg compression?) the file size varies.
Now I export an image, check the file size in the export folder, choose a higher/lower quality setting and export again. I repeat until I am close to a file size of 300k.
I was hoping there might be a way to set the maximum export file size.