WhatsApp is expected to soon rollout an update with new features. The latest update 2.17.285 is currently in beta mode, and it isn’t confirmed if WhatsApp will make all the features available. This update is currently being tested for WhatsApp on Android, and one of which is already available on iOS and Windows. For those who wish to try out the feature, can do so by becoming a beta tester and downloading the beta version on Google Play Store.
First reported by WABeatInfo, Storage Usage can be found under the Settings menu on WhatsApp. Under this, you can find storage details of your chats like total number of messages, number and size of media files including images, videos, and GIFs. You can also check details of documents, voice messages, locations and contact cards. In addition to displaying your storage details, this feature will also allow you to manage it. You can choose to select the folders and delete according to your choice.
WhatsApp is popularly used as the prime messaging app, but with multiple chats especially group chats the data takes up a huge amount of space. You can still manually clear files on your smartphone, but this feature gives a more organized approach making it easier. 
More features in this beta version include push name in for unknown contacts. When people who are not on your contact list WhatsApp you, their details are hidden. But with this new update, you will be able to see their push name in the contact info. However, WhatsApp allows one to hide their contact details from unknown contacts so this may also come with an option to do so.
WhatsApp could also include switching to video from voice calling with this update. Essentially, video and voice calling option will be integrated into and you can seamlessly switch between the two. Lastly, WhatsApp will possibly allow you to zoom in on profile pictures on WhatsApp. Features tested on beta versions do not necessarily confirm an official release. WhatsApp may or may not eventually roll out these features.