Do you want to transfer photos, music or films and your USB drive is just not enough? Then, an external hard drive with higher capacity should help you do all that. If you have been thinking of upgrading your home/office computer, you should choose an internal hard drive with a 2.5 inches form factor (for notebooks) or one with a 3.5 inches form factor (for desktop systems and servers). In order to avoid the motherboard incompatibility problems, you should take into consideration the connection interface. Depending on the motherboard, you should choose a hard disk compatible with the spindle speed and the transfer rate. Moreover, because in the hard disk field "more" means "better", our advice is to choose one with a bigger storage capacity, which will keep you careless of the next upgrade.