Ok, I have done the following:

1. I moved the game's contents to the C: drive using "Move Install Folder" button found under the Installed Files section of BG3 via the Steam App.
Note: It still says that the size of Installation is 79GB on Data (D:).
I have found this file. It is found under the following pathway
D:\SteamLibrary\steamapps\common
Similar Files exist for other games such as BG, BG2 etc.
So clearly I have been saving my Steam games to the D: drive (which makes sense as this is where I have the space)

Question: can I just move the Baldurs Gate 3 file from the D: drive to a location on the C: drive (the C: drive now being an upgraded SSD)?

I should add, the following C:\Program Files (x86)\Steam file can also be found on my C: drive. So I think I accessing the game using both drives.

Last edited by Baldrick; 27/07/23 11:26 PM.