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The easiest way is to use cloning software, of which there are many options. I like Clonezilla and DriveImage XML, both of which are available for free.
Here is a pretty comprehensive YouTube video that walks you through the cloning process. The guy making the video used EaseUS ToDo Backup free, which I’ve never used, but the process is pretty much the same with other software. https://www.youtube.com/watch?v=swGNP0wJBV8