With the Google Photos apps for iOS, macOS, and Windows, migrating your photo library from an Android device to an iPhone is now fairly straightforward (and vice versa).
If you’ve recently made the switch from Android to iPhone (or the other way around), it’s now a lot easier to move your photo library to your new device. Whatever your device is, the huge number of photos would seem to pretty much bake you into that operating system when it comes time to upgrade or you risk losing easy and convenient access to your photos and videos. If you’re like me, in no time, you’ll have thousands of photos on your device. Once you have a smartphone–iPhone or Android–for any length of time, you’ll quickly discover that the device makes it super easy to take pictures. Then, download and install the macOS client for Google Drive, and make sure the Google Photos folder is selected in the list of folders to sync, which will be displayed during the setup process. Download Backup and Sync for Mac Download Backup and Sync for Windows. Back up all of your content to the cloud – easily access your files in Google Drive and your photos in Google Photos. Learn to share your Google Photos library with another account.
To change the account that you backed up your photos to, share your photo library with that account. If you accidentally backed up your photos on the wrong Google account, you can move them to a different account.