WhatsApp can use up a lot of space and mobile data by automatically downloading some large photos, videos, and voice messages. Here's how to limit the types of media that are automatically download and the amount of mobile data WhatsApp calls use.
- Tap on the 3 dots top right and tap on 'Settings'.
- Tap on 'Storage and data'.
- Switch to toggle to 'Use less data for calls'.
- Under 'Media auto-download', go through the mobile data, Wi-Fi, and roaming options and untick your preferences for photos, audio, videos, and documents.