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.
FileRun - Beautiful, fast and reliable selfhosted file sharing and sync.
Dropbox - Online Sync and File Sharing
PHPfileNavigator - PHPfileNavigator: Administrador de ficheros y directorios via web.
Google Drive - Access and sync your files anywhere
PHP File Manager - phpFileManager is a complete filesystem management tool on a single file.
Mega - Secure File Storage and collaboration