A hard disk is a set of metal discs that are read and written into by magnetic heads. These heads tond touch the disc, so your disc never wears out. It relatively contains a lot of sotrage space, and is found inside your cpu.

What if you want to move loads of data between PCs at your office and your home? Use a laptop? But that is old fashioned. These days, things called external hard drives are available.

Get one 250 or 500 gb hard drive, and store anything that you watn in it, and all ytou need to do is just connect it to any pc or laptop’s usb, and it will be mounted as a removable disc, that means, you dont have to take the trouble of removing the cpu covers every time and plug the cables and the power supply when you want a hard disk mounted.

External hard Discs have been around for some time now, and recently the prices have started going low. And it is a good time to buy one and use it and make the best out of it. Pen Drives would go out dated very soon with 2.5 inch removable hard disks in the market.