How to resize C: partition

I have the issue that my C: drive is pretty much out of space, I keep getting low space warnings and I've tried moving everything I can to my D: drive. Basically it's a 1.5TB disk with C: and D: partitions. I'd like to take some of the space from D: maybe 100GB and move it to C:. It seems very hard to find a tutorial to do just that.

I feel like I can do it in Disk Management simply by shrinking D: by 100GB (or whatever) and then extending C: by that same amount but I want to be surethat I can do that without losing any data. I need this computer for work (and for play). Is there a straight forward tutorial on doing this somewhere? Thanks.

There is a flow in your plan. It's that pesky 350MB recovery partition because you cant extend or merge to D: with it in the way. It could be done only with adjacent partitions.
I don't know haw you ended up with so many recovery partitions. Normally only one is needed.

Huh... This is just the way it came. It's an Asus computer.

Huh... This is just the way it came. It's an Asus computer.

Was it new ? This looks like 2 upgrades were done.

Well I bought it new but I think it came with Win8 So I probably upgraded to 8.1 and then to 10.

Well I bought it new but I think it came with Win8 So I probably upgraded to 8.1 and then to 10.

That would do it. Personally, I don't use any recovery partitions, that problem is in my case solved by regular Macrium Reflect backup. If you don't need them you can get rid of middle and last one, not sure what could be done with first one. Last one is taking a lot of space.

Huh Well I don't think I have any other means to recover if I need to. Would it be possible to get rid of them now, resize, then create a new one later?

Huh Well I don't think I have any other means to recover if I need to. Would it be possible to get rid of them now, resize, then create a new one later?

Trick would be to find out which one is for which. The one for last upgrade is probably only one needed. One is probably factory one and would bring you back to initial windows installed on it. I have no idea how to find that out.

I was just looking at this Macrium Reflect, it says the free version can reorder and resize partitions.

I was just looking at this Macrium Reflect, it says the free version can reorder and resize partitions.

You can do it without it, right from disk management but that's not the problem. Problem is finding out which one you need to keep.
With MR you can just make backup of needed partitions and than recover just them without others but that doesn't make right choice of what to keep and what to discard.