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.
Vonage - Vonage is a cloud-based all-in-one VoIP software solution designed for multiple industries such as accounting, healthcare, finance and marketing etc.
Dropbox - Online Sync and File Sharing
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Google Drive - Access and sync your files anywhere
Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
Mega - Secure File Storage and collaboration