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.
Sewage backup coverage is available from most insurers as a rider to a home insurance policy. Coverage for $5,000 to $10,000 in damages can run about $75 to $150 a year, according to FEMA, and there's usually a deductible. Your cost will be tied to your risk.