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.
Dropbox - Online Sync and File Sharing
Transmit - Transmit is an FTP client for Mac OS X and Mac OS Classic (which is unsupported).
Google Drive - Access and sync your files anywhere
FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
Mega - Secure File Storage and collaboration
XYplorer - File Manager for Windows