If I understand your posts correctly your situation is simple. First a few bits of info to consider.
The older MBR system of Partitioning can handle HDD's up to 2 TB max. Any HDD larger than that MUST be partitioned instead under the new GPT system in order to use all of its space, irrespective of the number and size of Partitions created on it. These two types of Partitioning systems require that the OS use different device drivers. For Windows, relevant info here
https://docs.microsoft.com/en-us/previous-versions/windows/hardware/design/dn640535(v=vs.85)
For Windows 7, it CAN use both types of Partitioning systems for DATA disks. For a BOOT disk only the 64-bit version can boot from a GPT-Partitioned disk, and then ONLY if the mobo BIOS supports UEFI for booting from such devices. There is a note on that web page that suggests that, IF your BIOS is set to use the UEFI support system, then the BOOT drive MUST be GPT-Partiti0oned, but I'm not completely sure about that. NOTE that, if only your DATA disk(s) are GPT-Partitioned, you do NOT need to use UEFI Support in BIOS. (UEFI Support is used to boot from GPT-Partitioined disks.)
Now, OP, i believe you said that you intend to leave your system to boot from the existing 1 TB drive unit with MBR Partitioning, and then the new larger drive will be only for data. In that case it's relatively easy. When you install the new drive unit, use Windows' Disk Management to find it. RIGHT-click on it and choose to Create a New Simple Volume. Check the parameters it plans to use - no NOT just approve all the defaults. First, the type of Partitioning. For any drive over 2 TB, use GPT so all of it is available. For 2 TB or less, you can use either type. IF you opt for GPT, Win 7 will be sure to load and use the requisite device driver. The Primary Partition you set up first (no matter what its size) does NOT need to be BOOTABLE if this is a data disk only. Set its size to what you want - you can use less than full disk space and reserve some for another Partition, but you do not need to. For the Format options, a normal "Full Format" will inspect every Sector of the HDD for errors and note how to avoid them if any, but that will take hours to do, so just be patient. A Quick Format will not do all that testing so it is faster, and may be OK since this new unit is unlikely to have Bad Sectors - but that is STILL possible! The NTFS File System is right, of course. When all settings are your way, let it run the process. When it finishes. back out of Disk Management and reboot to find your new empty HDD in Explorer.