Originally Answered: What is the difference between tumour and cancer? A tumor can be benign or cancerous. A benign (non cancerous) tumor is a mass of cells that lacks the ability to invade neighboring tissue.
While portable slim hard drives are meant for carrying around in a backpack or laptop bag, all but the largest 32 TB and 64 TB external hard drives (featured here above) are still small enough for easy transport in a backpack or briefcase.
Hard Drive Types. There are two types of external drives. Desktop-class drives, with 3.5-inch mechanisms inside, require a power adapter. They are designed to stay in one place, typically on your desk at home or at the office.