Google Drive has a Auto Backup feature on iOS device which allows you to automatically backup photos and videos across your Google account. If you turned ON Auto Backup and decide to delete the Google Drive app, then you will have yo manually turn ON Auto Backup in other apps to continue using the feature. If you turned it ON in other apps, then you will need to switch it off in every app.
Quick Tip to Backup your Digital Photos
If you have treasured photographs, or you take photos of everything you like, you won't want to lose them. So, what is the best way to backup photos on an ongoing basis? In the back of your mind, you know you need to backup all of your photos. But where do you start? Here's how to backup your digital life: PicBackMan is the easiest and simplest way to keep your videos safely backed up in one or more online accounts. Simply download PicBackMan (it's free!), register your account, connect to your online store and tell PicBackMan where your videos are - PicBackMan does the rest, automatically. It bulk uploads all videos and keeps looking for new ones and uploads those too. You don't have to ever touch it.