Question: what is the difference between hard disk and pen drive?
Answer: Pen drive is usually smaller in size and capacity about 4,8,16,32,64 GB. But hard disk is usually starts at 128 GB and go till 4 TB and is larger in size. Hard disk is typically used as an portable device for backups, installing operating systems and as such. ... There is Platter in Hard Disk (Magnetic Platter).