I have a new Dell desktop which has 512 GB SSD. Now I have inserted an additional 1 TB HDD and from this HDD I have unallocated 100 GB. Please check the screenshot attached. But while installing Ubuntu(along with windows 10, dual boot) It is not showing this 100 Gb partition, instead, it shows the whole 1 TB HDD along with other Partition(from 512 GB SSD). Can anyone help me out?
Installing Step: