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
Fig Booking Software - Your all-in-one service business management tool
Google Drive - Access and sync your files anywhere
vCita - Online client engagement solution, convert website visitors to clients, free customizable contact form, free online appointment scheduler.
Mega - Secure File Storage and collaboration
Being Agile in Business - Simple introduction to agile project management for anyone