Follow these outlined process on how to backup data on phone and successfully backup data on either Android or iOS devices.
Backup on Android Devices
-On your Android phone, open the Google One app.
-At the bottom, tap Storage.
– Scroll to the device backup section. If this is your first phone backup: Tap Set up data backup.
-To find your backup settings, tap Manage backup. To back up the data on your phone, turn on Device data.
-Tap Back up now.
Backup on iOS Devices
– Go to Settings> [your name] > iCloud > iCloud Backup.
-Turn on iCloud Backup. This enables the iCloud to automatically back up your iPhone daily when iPhone is connected to power, locked, and connected to Wi-Fi.
-To perform a manual backup, tap Back Up Now.