You can turn off Back up using mobile data and turn on Transfer files only over Wi-Fi to save internet data in Google Drive app on Android phones.
How to turn off Back up using mobile data in Google Drive app on Android phone
To turn off Back up using mobile data on Drive app:
- On the Drive app, tap More options ≡.
- From the left panel, tap on Settings.
- In Settings, under Auto backup for apps, tap on Backup and reset.
- In Backup, under Advanced settings, turn OFF the toggle next to Back up using mobile data.
How to turn on Transfer files only over Wi-Fi in Google Drive app on Android phone
To turn on Transfer files only over Wi-Fi on Drive app:
- On the Drive app, tap More options ≡.
- From the left panel, tap on Settings.
- In Settings, under Data usage, turn ON the toggle next to Transfer files only over Wi-Fi.
Currently, I am using Drive app version 2.22. So these settings may be different in different versions.