I was trying to add my first post but after I attached an image file I noticed it got automatically uploaded to ghostarchive.org, archive.org and archive.today even before making the actual post. There is also no warning about that anywhere to be seen. I think this is major privacy concern especially that user has no control to delete that image from abovementioned services. What if you mistakenly pick private image to upload when creating post? You can remove it from Lemmy to correct it but it’s already outside of your control.

Long story short: you completely lose control over any image you attach when trying to create Lemmy post.

edit: uploaded a screenshot (sorry it’s in Polish) + that’s the link you get when you click on ‘archive.org’ - https://web.archive.org/web/20230614181328/https://lemmy.world/pictrs/image/a307f984-4d30-4f45-813f-cbedfe1b596d.png

edit2: big thanks to @sunasaurus for explanation https://lemmy.world/comment/180906