When I go to "select backup drive" in time machine, the drive I am backing up on has "encrypt backups" checked, but it is greyed out. When reading the Apple help articles, it says if this option is grayed out I tis not available for that particular drive. However, I have other drives that are mounted which has this grayed out and it IS NOT checked. So, I'm wondering if the backup is indeed encrypted, and I cannot modify this setting because I am actively in the middle of a huge backup?