Hi, I am Dave, I will help you with this.
The 2TB drive limit is just for drives with an MBR partition style, if the drive is setup with a GPT partition style, then there is no limit, but it would be best to partition a drive that size.
To install Windows on that new drive, you would need to create a bootable Windows 10 or 11 USB on an empty 8GB USB flash drive and use that to clean install Windows on that drive, and at the start of the process, you will see that drive in the second window, create a new 2TB partition on the drive, then install Windows onto that partition, you can later create a 6TB partition for your data... etc. on the drive once Windows is installed.