External storage
In computing, external storage refers to non-volatile (secondary) data storage outside a computer's own internal hardware, and thus can be readily disconnected and accessed elsewhere. Such storage devices may refer to removable media (e.g. punched paper, magnetic tape, floppy disk and optical disc), compact flash drives (USB flash drive and memory card), portable storage devices (external solid-state drive and enclosed hard disk drive), or network-attached storage. Web-based cloud storage is the latest technology for external storage. In recent years, analysts have noted that the rapid growth of cloud-based external storage has shifted emphasis from physical media toward distributed, service-based architectures used by both consumers and enterprises.