From movies to songs, from documents to other files, all types of data require storage for access in future. Certain devices called storage devices fulfill this purpose. Commonly there are two types of storage devices: primary devices and secondary devices.
In modern computers hard disk drives and solid state drives are usually known as secondary storage. There are lots of storages devices out there in market such as ssd drives, sd cards, hard disk drives, external hard disks, usb drives, usb flash drives and so on.