The plainview doctrine is one of the scariest doctrine created given modern technology.

If the police execute an arrest warrant at your house, they can only look on places large enough for a person to hide. So if they looked in your desk drawer and found a kilo of blow, they can cease it, but they can't arrest you for it. They also can't look on your computer.

But if they have a search warrant and are looking for information that can be located on microSD or ssd, they could look anywhere in your house and through all of your computers.