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.
Notebook-class drives come in capacities up to 4TB, but capacities from 500GB to 2TB are most common. A word about multiple drives: You can increase capacity, speed, or data protection by buying an external RAID array, but multiple drives add expense and (some) complexity. Once you connect a single-volume external RAID array to your PC or Mac, it will show up and act as any other external drive.