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.
Duo Security - Duo Security provides cloud-based two-factor authentication. Duo’s technology can be deployed to protect users, data, and applications from breaches, credential theft, and account takeover.
Dropbox - Online Sync and File Sharing
Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
Google Drive - Access and sync your files anywhere
Lastpass - LastPass is an online password manager and form filler that makes web browsing easier and more secure.
Mega - Secure File Storage and collaboration