I recently bought brand new parts for a computer. This was my first build and I like to game as well as edit videos. So I got a 4TB hard drive. After I finished my install with windows, I noticed that it only recognized 2TB of HDD. Looked this up and found out that that normal drive is in MBR and it is only compatible with 2TB. I watched like 10 youtube videos going through and formatting into a GPT. When going through the diskpart at the initial install, my HDD was then reverted back into a MBR when it installed Windows. Looking through people's videos using the Disk Manager, their screens don't look like mine. I have attached a photo of what my Disk management looks like without and when I right click the 1678.02 unallocated space. If possible I would love to merge the 48GB + 1678.02 GB, shrink the 1999.90 GB partition to about 500GB and have three Volumes, C, D, and E or whatever order it goes in. One being 2TB, another being 500GB, and the last one being whatever is left over ( Just over 1TB.) If you could help, thank you.