A:AnswerYes. Just connect the 2 together with a USB cable and you can move files back and forth between the 2. They should recognize each other as external hard drives. If your old computer is no longer working then you may need to remove the hard drive and connect directly to it. That will require additional equipment.
A:AnswerMemory can make your computer run faster and more efficient, Hard drive for storage. it depends what is more important to you. Speed or Space for file storage.