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.
S3 Browser - S3 Browser is the name of an easy and simple to use Amazon S3 clients for the Windows operating systems.
Dropbox - Online Sync and File Sharing
S3Fox Organizer - The S3Fox Organizer(S3Fox), offers the ability to upload or download files to and from Amazon S3.
Google Drive - Access and sync your files anywhere
Storage Made Easy - The leading Enterprise File Share and Sync solution
Mega - Secure File Storage and collaboration