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External storage refers to devices or media that provide additional storage space for computers, smartphones, cameras, and other electronic devices. This type of storage is not built into the device itself, but rather can be plugged in or connected externally. External storage devices include USB flash drives, external hard drives, memory cards, and network-attached storage (NAS) devices. These devices allow users to store and access large amounts of data, such as documents, photos, videos, and music, that cannot fit on the device's internal storage. External storage options are portable, versatile, and can be easily transferred between different devices for backup or sharing purposes.