I just had to have a new motherboard, RAM, and processor put into my computer. I had already bought a new 250Gb SSD for the OS and a 3Tb drive for the data storage. I now have Disk 1-- C: drive, the SSD with the OS, and Disk 0--a System Reserved 100Mb partition without a drive letter showing 70% free, a partition marked Healthy Primary Partition, 2047.90Gb with 100% free and a 746Gb unallocated partition with a black bar (on computer management) which will not allow me to give it a drive letter.
How do I get my 746 Gb back? The drive is completely blank as I have not added any applications or data.