Our data is stored on servers hosted by Amazon Web Services (AWS), one of the best hosting providers in the business. AWS provides a highly reliable and scalable infrastructure platform in the cloud that powers hundreds of thousands of businesses in 190 countries around the world.
The software runs on secured servers and your access to your data is secured with the industry standard SSL/TLS encryption. See "Security policy" for more details on this.
Your data is stored at AWS data centers. AWS data centers are housed in nondescript facilities. Physical access is strictly controlled both at the perimeter and at building ingress points by professional security staff utilizing video surveillance, intrusion detection systems, and other electronic means.
AWS storage system is designed to deliver 99.999999999% durability, and stores data for millions of applications used by market leaders in every industry.
Databases are also backed up nightly. Nightly backups are kept on file for thirty-five days, and weekly backups are kept on file for two years.
If you'd like to keep a copy of your data on your own computer, it's an easy thing to do. See "Export data from Buildium"