I tried sending a video files of about 716MB via WhatsApp Business. It obviously did not allow me to do so & it would basically freeze up on the loading screen until I closed the app. I deleted the video from my phone & the app's chat as well. But now, I have seemingly invisible 400MB of data in the app that I cannot get rid of. Presently, I do not want to reset the app despite having a backup as I do not have the SIM card to the registered line. Please help.