That’s automatically done for all posts after you submit it.
The “download remote images to local” setting is probably what you’re thinking about. It turns off automatically when there is less than 25% disk space left, and the admin must manually turn it back on (and change the % or free up disk space).
After you mentioned it in the previous topic, I figured the playstore links a different format depending of the browser you’re on. I think I’m using the firefox version, and maybe its the lack of a extension in the filename.