There are endless ways to share files between devices. Some of them are complex, ftp and Network File System (NFS). Some, such as Apple Bonjour and Windows Homegroup, work with only a few operating systems. Still others, like Dropbox and Google Drive, require you to use a cloud. Then, there’s BitTorrent Sync 2.0, which is easy to use, works with most devices, and doesn’t use a cloud.