Checked October 3, 2026 against two Google Photos Help pages for Android: "Free up space on your device" and "Delete photos & videos". We did not run these actions on a phone or inspect any account for this guide. iPhone and iPad behavior is not covered.
Short answer: a backed-up photo can exist in two places — on your phone and in your Google Photos library. "Free up space" removes the phone copy of backed-up items. Deleting in the app removes both. "Undo device backup" removes the Google Photos copy of what is on that phone and keeps the phone files. Decide first which copy you want to keep.
Which copy does each action remove?
| Action | Phone copy | Google Photos copy | Check first | Caveat |
|---|---|---|---|---|
| Free up space on this device | Removed (backed-up items) | Kept | That the photos are actually backed up | Removed items won’t show in the phone’s built-in gallery, offline, or when you’re signed out of the Photos app |
| Delete (move to trash) in the Photos app | Removed | Removed | Whether you need either copy | If backed up, the same items are deleted on all devices with backup turned on; a full trash can prompt "Delete permanently" |
| Undo device backup | Kept | Removed for items currently on that phone | Whether you rely on the cloud copy | Backup switches off on that phone; items may be backed up again from other signed-in devices with backup on, or via a partner who has auto save on |
Sources: Free up space on your device (Android) and Delete photos & videos (Android).
1. Free up space: the phone copy goes, the library copy stays
Google describes this as a way to "save space on your device when you delete photos that are safely backed up", and warns plainly: "This feature deletes photos from your device." Before using it, Google says you must make sure your photos are already backed up properly.
Afterwards, Google says you can still see the removed items in the Google Photos app and at photos.google.com — but not in your device’s built-in gallery, not while offline, and not when you’re signed out of the Google Photos app. That is one reason a gallery can look empty after a cleanup: the phone copy is gone and the remaining copy is online.
Google also notes that photos and videos fewer than 30 days old may be retained on your device.
This frees phone storage. Google’s page does not describe it as freeing Google account storage.
2. Delete: both copies, on every device with backup on
Google says deleting from the Google Photos app deletes the same items from your device — "both the Google Photos copy and the one on your device will be deleted." If the items are backed up, the same content is deleted on all devices with backup turned on. Deleted items are also removed from places such as Google Photos albums and shared albums; Google lists Blogger, Drive, Gmail and YouTube as places they aren’t automatically removed from.
Don’t count on the trash as a safety net. Google’s page ties the trash to conditions (backed-up items, or Android 11 and up), says a full trash can prompt you to "Delete permanently", and says permanently deleted items can’t be restored.
To remove something from Google Photos but keep it on the phone, Google describes a separate route: turn off backup on every device where the item should stay, then delete it at photos.google.com. Turning backup off is the first step of that route, not a removal by itself. Google warns that if you turn backup back on, the item may be backed up again, or the device copy may be deleted.
3. Undo device backup: the cloud copy of this phone goes, the phone files stay
According to Google, undoing device backup removes all the photos and videos currently found on your device from Google Photos, and "The photos and videos will remain on your device." Backup is then turned off automatically on that device.
From the same page:
- Locked Folder and device folders are included.
- The items also disappear from albums, shared albums, search results and memories.
- If the same account is signed in on other devices with backup on, the items may be backed up again.
- If your partner has auto save on, the photos may be re-uploaded through your partner’s account.
Google’s wording covers items "currently found on your device"; it does not spell out what happens to library items from an older phone that aren’t on this one, so we don’t assume either way. Neither page promises how much Google account storage you get back.
Two fictional examples
Mina’s phone is full. She wants the photos to stay viewable online. Free up space fits — after confirming backup — if she’s fine viewing them in the Photos app, online.
Jun wants his photos on the phone only. Undo device backup matches that goal, but the phone becomes his only copy unless he keeps another backup, and other signed-in devices or partner sharing can upload items again.
Before you tap anything
- Is your phone full, or are you trying to change what’s in Google Photos?
- Which copy do you want to keep afterwards?
- Are the items you care about actually backed up?
- Is the same account signed in on other devices with backup on? Is partner sharing on?
- Are you reading the Android instructions? This guide does not cover iPhone or iPad.
FAQ
Is a cloud copy the same as a separate backup? Not in this guide’s terms. A delete in the app reaches every device with backup on, so we don’t treat sync as an independent offline backup.
Will the menus look exactly like this? Labels can change between app versions. Re-check the linked Google pages before you act.
Sources: Google Photos Help, "Free up space on your device" (Android) and "Delete photos & videos" (Android), both read October 3, 2026.