Hello @MrVietnam. When a thread expires, please do not delete it.
You can post a reply as you did stating that it is expired (you can also add “EXPIRED” in front of the title to alert the other members and also provide another means for mods to spot expired threads). The next mod to see your reply or title change will move it to the expired sub-forum. Since we are all volunteers, it may take a little but for that to happen. However, if it is taking a very long time to be moved, you can flag the moderators and explain your request there.
Thanks for understanding. We hope to have a more streamlined expiration process down the line when resources allow.