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Wiktionary
file sharing

n. 1 (context computing English) The process of making files available to others to download from the Internet. 2 (context computing English) The use of a file sharing network, or peer-to-peer software.

Wikipedia
File sharing

File sharing is the practice of distributing or providing access to digital media, such as computer programs, multimedia (audio, images and video), documents or electronic books. File sharing may be achieved in a number of ways. Common methods of storage, transmission and dispersion include manual sharing utilizing removable media, centralized servers on computer networks, World Wide Web-based hyperlinked documents, and the use of distributed peer-to-peer networking.