Download your Twitter archive

You can request a full record and archive of all your Twitter activity — all your tweets, photos, followers, and more — by heading to your Account options page on the website or in the app. It might take a while to download depending on how active your account is, but you'll be able to download it on any device... More here.

I had never thought of doing this, but have now requested my archive. Sure it will arrive at some point...