How to delete a user from your PS5 (step by step)
This step-by-step tutorial will show you how to delete a user profile and account from your PlayStation 5.
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WARNING: If you delete a user, their saved data, screenshots, and video clips will also be deleted from your PS5.
Delete a user from your PS5
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Open settings.
 
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Open Users and Accounts.
 
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Select Delete Users.
 
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Select the user you want to delete.
 
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Press the X button on your controller.
 
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Select Yes.
 
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Press the X button on your controller.
 
The user is now deleted from your PS5.
References:
https://www.makeuseof.com/how-to-delete-ps5-user-accounts/
https://www.howtogeek.com/everything-you-need-to-know-about-ps5-user-accounts/