If you want to manage your storage space while downloading via the official app, here are the approximate file sizes for Ek Thi Begum Season 1 (10 episodes):
If you're looking to download the Hindi dubbed version of Season 1, here are some options: download ek thi begum 2020 hindi season 1 work
Streams are available in high definition with official subtitles and audio options. Step-by-Step Guide for Offline Playback If you want to manage your storage space