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
Yardi Voyager - Voyager is software for managing properties and the people who live there. The software is developed by Yardi, a company founded in 1984 that specializes in property management software. Read more about Yardi Voyager.
Google Drive - Access and sync your files anywhere
Buildium - Buildium's software helps property management companies become more efficient and profitable. Start your free trial today, no credit card required!
Mega - Secure File Storage and collaboration
ResMan - ResMan is a property management software that manages all kinds of properties, from residential housing facilities to commercial buildings.