This what you want to see ?
View attachment 20761
Looks like you cloned Disk0?
You could use backup software instead, and make a backup of your 80GB of stuff on the C:\ drive.
The backup would be about 40GB in size.
Then you could partition your 1TB drive like so...
Disk 1
You could also use some free partitioning software and adjust your Disk 0 to look like this...
Disk 0
Then you'd have... C, D, E, F drives.
C = Windows (with the EFI and Recovery partitions)
D = whatever (maybe another OS)
E = backups storage
F = large storage space
Then, because everything is organized... if you DO have a problem in the future... those looking at your Disk Management,
would be able to suggest things... easily.
Steps to do all this...
1. Get partition software like... EaseUS Partition Master or Minitools Partition Wizard (both free).
2. Shrink the giant partition on Disk 0 down to 238GB, leaving 238GB unallocated.
3. Use the unallocated space (238GB), to create another partition called: D
4. Delete all the partitions off of the 1TB Disk 1 drive.
5. Create a new 200GB partition on the 1Tb drive, called: E
6. Use the rest of the space on the 1TB drive to create another partition called: F
Note:
If the current G:\ drive is another Windows install... after you do steps 1-3, you could move that 2nd Windows install to the D:\ drive. This would be step #3.1
Ofc, you would want to turn off Bitlocker, everywhere, before you did any of this.