The Open Source Cartridge Reader is a great project for backing up saves (very useful for replacing dying batteries) and dumping roms. It’s also great soldering practice. I chose to go the kit route from here since it was only slightly more expensive with the case than source everything yourself (no case kit: $125, with case: $145, source yourself: ~$134).
I think the issue will resolve itself once lemmy.world allows for image uploads again. Then you can add images to the body of the post again without a third party site.