Large amount of paritions, which ones am I free to delete?

Hi, Ive already downloaded and installed minitool partition wizard.

If someone would be so kind as to help me fix my harddrives partition minefield. When i installed windows 10 i did it with both other drives installed as well, and, for me at least, that usually results in what i remember being called the MBR installed on a drive other than c:

Heres an image of the disaster.

EDIT: looking at the pic, i have some questions. why is GPT disk 2 (an nvme drive, and c:) named disk 2? is that slowing my pc down? my e: disk 1 is a wd blue 6tb. disk 3 is an nvme ssd for games.

Thanks

Hi, you have 3 physical disks installed. As far as I can see, all your Windows partitions are on 1 disk.

If you like, you can disconnect the other two, and check your PC still boots ok.

The odd thing is your O/S seems to be on a HDD rather than benefitting from being on your SSD.

Ah, it wasn't clear to me you have 2 SSDs.

If you can't disconnect or unplug it easily, you could hide partitions I guess.

That idea was simply an optional pragmatic check to definitively show everything for your O/S is on the correct disk - you'd also need to check you can boot to Advanced Startup options (Recovery partition).

If i plug a USB thumb drive in, it becomes D

- yes, unless you had assigned a drive letter to that USB drive e.g. X - a useful trick in Disk Management so backup drives are always assigned the same letter, for example.