Office Backup allows performing several operations on the backup data.
To start with, you can compress the backup data to save space on the storage medium. If you wish to do so, check the box Compress data to save space.
If you do not want to compress data, leave it unchecked.
The second checkbox in this window is Encrypt the backup data for security reasons. When checked, this option will apply encryption to the backup data, which is needed to protect it from unauthorized access and hacker attacks. To protect backup data with a password, enter password in the Password and Confirm password fields.