Hi Garytelecastor,
Sorry for the late response. To perform a full format recovery, kindly follow the guidelines here: https://us.en.kb.sony.com/app/answers/detail/a_id/36806. Steps 4,5,6,7,8 might not in your options, simply follow the on-screen instructions.
Best regards,
Vincent
If my post answers your question, please mark it as "Accept as Solution"