Backing up data
BRM runs on the Google App Engine infrastructure, meaning it is very secure and extremely well backed up. The data lives in the cloud, which in reality means it lives inside lots of powerful computers inside data centers. All of the data is automatically copied to other computers, and even other data centres instantly.
This means that your data is very well protected from hardware failure. (which is something you wouldn't get for example if you were running software on your own computer or server).