Data storage is another area of application of nanotechnology. Data storage devices need to be smaller and a way to succeed in this is to write and read data with more density. The atomic force microscopy is suitable for such a task. Data storage with a density of 400–500 Gb/in.² can be achieved, about 10 times more dense than conventional magnetic data storage devices. The small size will allow for use in watches, cellular telephones, laptop computers, whilst its high-density data storage capability will lead to terabit data storage systems on 2.5 in. hard disks.