Once a user downloads Google Drive from the App Store, they can navigate toward the backup wizard by going to Menu > Settings > Backup in the app. From there, users can choose to sync select contacts, calendar events and photos or everything. Google recommends that users backup when their iPhone is connected to power and is on Wi-Fi, as backing up can take several hours. Additionally, the Google Drive app must stay open and the screen must stay on.
When users sign into their Google account on their new Android device their content will automatically sync.
Google has tried to make it easier for iPhone users to switch to Android in recent months, packing in a "Quick Switch Adapter" with the Pixel, which quickly transfers data directly from an iPhone to a Pixel phone. While the Quick Switch Adapter only works with the Pixel phone, the Google Drive method will also work with non-Pixel Android phones.
iPhone users who want to switch to Android must turn off iMessage before they officially switch devices.
Google Drive is available in the App Store for free. [Direct Link]