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
Sandbox Software - One of the fastest-growing child care software companies in North America, helping early educators manage their centers and engage with parents.
Google Drive - Access and sync your files anywhere
extendedReach - extendedReach offers an easy, affordable way to track children, foster homes, case notes, reports, and outcomes.
Mega - Secure File Storage and collaboration
LifeCubby - LifeCubby offers early learning, and connects life chapters for parents by giving them a free account that they can keep and use forever.