- The only way to remove an account from Google Photos is to entirely remove the Google account from your device.
- If you don’t want to remove the Google account, turn off backup for the account on Google Photos.
- Alternatively, use Google Photos without an account on your Android device.
How to Remove a Google Account
Unfortunately, you cannot remove an account from Google Photos. To do so, you must remove the Google Account from your device. Doing this will sign you out and remove the account for all the Google apps on your device.
On Android
Step 1: Open the Settings app and scroll to Passwords & accounts .
Step 2: Select the Google account you want to remove. Tap on Remove account .

On iPhone
Step 1 : Open Google Photos and tap on the Profile Picture icon at the top right.
Step 2 : Tap on Manage Accounts on This Device and Remove the account from the list.
If you don’t want to remove the Google account, you can browse Google Photos without an account or turn off the account’s backup.
How to Use Google Photos Without an Account (Android)
On your Android device, you can use Google Photos without an account. Tap on the Profile icon at the top right and select Use Without an Account .

How to Turn off Backup
You can prevent photos from backing up to an account by tapping on your profile icon > opening Settings > going to Backup > turning it off.

You can then choose a new account and enable backup for the same.