3000×2000 is unnecessary and too much
#WebsiteOptimization Do not upload the largest files you have for your photos. The larger the file, the longer the load times will be. Compress the image in order to improve the load times with no loss in image quality.
Here is one service I like that does the job well with no image quality loss.
The link will give me an extra 10 image optimization per month. Shortpixel will give you 150 free image optimizations. Thank you for clicking.