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.
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.
Dropbox - Online Sync and File Sharing
Buildium - Buildium's software helps property management companies become more efficient and profitable. Start your free trial today, no credit card required!
Google Drive - Access and sync your files anywhere
Building Engines - Property management software for commercial real estate work orders, preventative maintenance and inspections.
Mega - Secure File Storage and collaboration