Is it possible to transfer storage between my C and D drives?

You can't directly transfer capacity between two physical drives. If you had a single physical drive with partitions, then it would be a different story. But since you mentioned you have distinct drives, just moving files from C to D is your best bet.

There is a way to create a spanned volume, combining the free space of both drives, but it's risky. If one drive fails, you could lose everything in that volume. So, back everything up before trying that. Personally, I’d recommend expanding your D drive's storage instead.

Nope, that's not really how it works. Think of it like two cups of liquid: you can’t physically transfer the empty space. You can only move data from one drive (like your C drive) to the other (your D drive) to balance things out. It's all about managing the data rather than the maximum allowed capacity.

Unfortunately, you can't just take away capacity from one drive to give to another. Drives have fixed maximum capacities. However, you can manually move data from your C drive to your D drive to free up some space on C. That way, you can store more on D without losing anything! Just keep in mind that programs often need to be uninstalled and reinstalled to switch to your D drive.