Oppo
Turn Google Backup On or Off auf Oppo
When your Oppo phone stops saving app settings, call logs or Wi-Fi passwords to Google Drive, the built-in backup service is usually switched off. On Oppo phones this setting is separate from Oppo Cloud, so enabling one does not automatically turn on the other.
To check or change it, go to Tap on Settings ➔ Tap on Additional settings ➔ Tap on Back up and reset ➔ Enable or disable Back up my data. Once turned on, Android uploads app data, call history and device settings to your Google account while the phone charges and stays connected to Wi-Fi.
Turning the option off stops new data from being sent, but any backup already stored in your Google account stays there until you delete it manually. Disabling it makes sense if you rely only on Oppo Cloud or a local backup, or if you want to limit what leaves the device.
If nothing appears in Google Drive after enabling the setting, confirm you are signed into a Google account and let the phone complete one full charging cycle on Wi-Fi, since the sync does not always run right away.