To download your Twitter archive:

1. Go to your account settings by clicking on the profile icon at the top right of the page and selecting Settings from the drop-down menu.
2. Click Request your archive.
3. When your download is ready, Twitter will send you an email with a download link to the confirmed email address associated with your Twitter account.
4. Once you receive the email, click the Go now button to log in to your Twitter account and download a .zip file of your Twitter archive.