Use Time Machine to back up - Apple Support

Time Machine does not let me restore from… - Apple Community

Apple Time Machine Recovery Mode and T4 RAID – CalDigit

How to Fix Time Machine Restore Button Greyed Out

How to Backup and Restore Mac using Time Machine

Back up your files with Time Machine on Mac - Apple Support

Transfer your data to your new Mac mini - Apple Support

How to Set Up a Time Machine Backup in macOS

Other Ways to Back up and Restore Files - Laptop/Mobile Service Center

iPhone User Guide - Apple Support

Big Sur USB without Apple Store : r/MacOS

How to Reset a MacBook Pro & Restore to Factory Settings