To Dual Boot, say Windows and Ubuntu, on separate Hard Drives, you must first meet the prerequisite and then follow the steps mentioned here.

Making an ISO image of a hard drive means creating a 1-to-1 backup copy that consists of a .iso file. Here are two ways to do just that.

In general, laptops don't boot from external drives.<BR><BR>Internal 2.5" IDE drives for laptops are very inexpensive. As you can see here, an 18.1GB hard drive can be had for $89.

The PS5's storage space can be expanded with an external USB device--as long as you have the right hard drive.