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
Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
Google Drive - Access and sync your files anywhere
Double Commander - Double Commander is a cross-platform open source file manager with two panels side by side.
Mega - Secure File Storage and collaboration
XYplorer - File Manager for Windows