Things have gotten better in recent years when it comes to sending files to others. While it is still possible to store files on ftp servers or web servers, options such as cloud storage have become available as well. Services like Dropbox, OneDrive or Google Drive offer storage space on the Internet that users can fill with data.
Infinit is different and more in line with BitTorrent Sync than any of the aforementioned cloud storage services. One of the core differences is that it does not provide you with a set amount of storage space on the Internet.