Open WhatsApp on your smartphone.
Tap on the three dots in the top right corner (Android) or go to “Settings” (iOS).
Navigate to "Chats" > "Chat backup".
Choose to back up to Google Drive (Android) or iCloud (iOS). You can set the frequency of backups (daily, weekly, monthly) and whether to include videos.
Tap "Back Up" to begin immediately. Ensure you're connected to Wi-Fi to avoid data charges.