If you upload a resized image through the media library, the -scaled files are unaffected. The new upload is treated as a completely different image.
If you upload a resized image via FTP using the original image file name, it will essentially be ignored as the internal WP data is expecting everything to include the -scaled suffix. However, if you the use a plugin that regenerates image sizes, it should create a new set of images without the -scaled suffix that WP will then use instead.
I’m assuming a lot from a plugin I’ve not used though. Do some testing for yourself so you’re satisfied it’s doing what you want. I suspect you may have to manually delete the -scaled files if you don’t want them taking up server space. It may be easier to do so before regenerating image sizes. Make backups and do thorough testing before embarking upon significant changes.
Thread Starter
Matt
(@mattm3)
Thanks bcworkz,
I ended up just resizing all the images on my clients website, so resized the full sized images as well as the -scaled images and then regenerating the thumbnails.
That has done the trick.
Thanks for your reply.