This week Google released an update to the Photos app. It is only available on Android but soon it should be released for iOS devices. This update will solve my issue of the full SD card and might just prevent me from buying more cards.
What magical feature is this? The app will scan your phone and let you know how much space you will save if you delete the images and videos you already have backed up to Google Drive. Follow the steps below to run this feature on your Android device.
Open the Google Photos app.
Click the hamburger icon on the upper left side. (Three lines.)
Click Free up device storage.
The app will start scanning your device and comparing it to what you have saved online.
My phone took an hour or so for this alert to pop.
Click DELETE to remove the images from your phone. I was able to free up almost a whole gig!
It will only delete the videos and images from your phone and not the exact copies you have backed up in your Google Drive.