This will bring out the left-hand drawer. First, open up the Twitter mobile app, and tap your profile’s avatar in the upper-left corner.Here’s how to wipe out your data cache and make up some extra storage space. Twitter currently lets iOS users do this directly from the app, which helps to prevent your iPhone from becoming bloated with preloaded videos, GIFs, and memes you don’t necessarily need to see immediately. Whether you’ve got an older iPhone with less internal storage or would rather save that space for music, photos, and other content, it’s always good practice to clear the data cache from various apps to make room for what you really need on your phone.