Creating and restoring backups is not available for personal environments.
We keep backups of the whole infrastructure for system-wide disaster recovery purposes, but personal environment users can't recover their own environment. OutSystems Enterprise Platform has an integrated version control system, that allows you to rollback to a previous version of an application.
If you're evaluating OutSystems Platform for your enterprise using a personal environment, and want to store sensitive data, contact support.
If you're curious about the infrastructure used for running a personal environment, check What infrastructure is the personal environment running on?