For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
Link Shell Extension - Link Shell Extension (LSE) provides for the creation of Hardlinks , Junctions , Volume Mountpoints...
Dropbox - Online Sync and File Sharing
Symlink Creator - Symbolic Link Creator. GUI for mklink (Microsoft Windows symlink utility).
Google Drive - Access and sync your files anywhere
FileMenu Tools - FileMenu Tools lets you customize the context (right-click) menu of Windows Explorer.
Mega - Secure File Storage and collaboration