What is 4Sync?
4Sync is a free online file-sharing service that provides storage for music, video and photo files. Upon registering for an account 4Sync 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. 4Sync sets a 2048-MB size limitation per file.
4Sync also offers an application programming interface (API) that allows others to implement different 4Sync services (e.g. search, login) on Web sites.