Your missing photos or videos may not be backed up to Google Photos. Your backup settings are important to how and when Google Photos backs up your items.
Review backup settings
- Open Google Photos
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- At the top, tap your account profile photo or initial
Photos settings
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- Tap Back up.
- Check your settings:
- Back up: Make sure "Back up" is turned on.
- Backup account: Make sure you back up your photos and videos to the right Google Account.
- Back up device folders: If you want to find photos and videos on your Android phone from other apps or devices in your Google Photos Account, make sure you turn on your available device folders.
- When to back up: Make sure you know when Google Photos backs up your photos and videos. You can choose to back up items over mobile data.
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Photos settings 
.Tip: If you use an iPhone or iPad, do not quit the Google Photos app while it’s backing up items.
Still missing photos or videos?
- Check your trash or archive
- Find items from other apps or devices
- Ask the Google Photos Community for more help