Ok fixed second drive no problems. Didn't even need my backup.
First drive has:
A small section or partition which is reserved
then C: with 96 Gb, with operating system and program files, etc, 80% full.
I added D: and called it My Data, don't remember why, it's about 30% full.
and Unallocated space of 33Gb that is empty.
I tried to use the free partition from EasUS to add the Unallocated to C:. I use my desktop for a lot of semi- Temporary holding folders.
Will C: expand into the Unallocated space if it needs to?
I couldn't see a war to add the 33Gb of space to C: so it would have more room.