Exactly what I needed thank you for this

unfortunately I didn't take your advice and left the computer as it was.
Having a problem now though. My (C) drive has only 18.5GB free and I couldn't download an app onto it. I clicked on Local Disk (D) drive which has been inactive and it said something like configure and run so I did that and now it's there and I could add folders like Videos/Music to it.
However, I still cannot download stuff directly to it.
I have changed setting (view advanced settings) save downloaded files to the (D) drive but that hasn't worked. What do I need to do to get everything downloading on the (D) drive.
Also will I need to free up some space soon for my Holdem Manager to work on the (C).
Thanks for any help and sorry for the noob questions

you could just delete some stuff. or buy an external hard drive and dump stuff to it, 1TB comes in at under 50 euros

the problem is my d drive has 1TB of free space (never used) but I just can't seem to put anything onto it or move anything from c

remove write protection?