What is Backin?
Backin is a free online file-sharing service that provides storage for music, video and photo files. Upon registering for an account Backin will provide users with 10-GB of online storage space. However, files stored by users with free accounts are removed if you do not log in the account for 180 days. Backin sets a 2048-MB size limitation per file.
Backin also offers an application programming interface (API) that allows others to implement different Backin services (e.g. search, login) on Web sites.