It was too bad that the New Simple Volume, New Spanned Volume, New Stripped Volume, New Mirrored Volume, New RAID-5 Volume greyed out so that you cannot create new partition with this unallocated space.
The cost to add sewer backup could range from $10 to $250 per year with traditional home insurance policies. Not all insurance policies (or homes) are created equal. Some companies allow you to add sewer backup to your policy, but will limit the amount of coverage to $5,000.
You can typically purchase sewer backup insurance for an additional premium of $40-$50 per year; a small price to pay for significant piece of mind and protection. If you live in a flood plain or near a river or stream, you may be required to carry flood insurance, as well.