Hi Ken
Thank you fro the screenshot, your drive and partition layout is as I thought is would be, that is why I needed to see that . . .
You have two physically separate driver, a 128GB SSD (118.02GB usable) and a separate 2TB hard drive
You cannot add space form that 2TB drive onto your C drive, because it is a physically separate drive . ..
To make more space on your 128GB SSD, here are a few tips on the best wayto manage space on that SSD:
1.
Move all your User Library folders to D:
Open Windows File Explorer
In the right hand pane, right click your Documents folder and choose Properties
Select the Location tab
In the Location box, type D:\Documents then click Apply and Ok
When that move completes, do the same for Pictures, Videos and Music
Each time, provide a new folder location, for example, Pictures will go to D:\Pictures
2.
Move the location of all future content downloaded from the Microsoft Store
Open the Settings App (gear icon on your Start Menu)
Go to System - Storage - Change where new content is saved:
Change all options you find there to D
3.
If you are a Steam Gamer
Stop all processes associated with Steam
Move the Steam folder to your D drive manually
Then open the Steam Control Panel and point that to the new location
4.
Please Note: this should ideally be done before you begin installing any software
For 3rd party applications, some will allow you to choose an installation location, for those, create a new Program files folder on your D drive, then for each application, create a new sub-folder of that folder
Other 3rd party applications will not allow you to change the installation location, and there is no safe way to move those to your D drive . . .