Recuva

Hi, If you have used your external drive to save some data on, then do a defrag first.
Of the 2 programs for Partitioning I mentioned, Easeus P. M. is more popular, but I think the Minitool version is slightly easier to use. They both do the same job and there are other programs too.
About formatting, yes it is done as part of the process, or can be if you want.
If you have 2 TB drive, as bought, it will be one big 2TB partition. The most partitions you can have easily are 4.
So if you want to split 2TB into 4 partitions that will work well, you will lose a bit of space but should look like 4 x 475 GB in the end.
You don't have to have all equal partitions, can be anything you want.
Also you can choose the drive letters as you do the work, it's better to choose letters well away from card readers you may have now or any other letters that you see now. That's why I made my 320GB into X,Y and Z.
The basic way partitioning works is, you click on the partition you want to resize, to highlight it.
Then right-click. All the options appear. One is 'Format' so you need NTFS.
Then you point to the left edge of the partition, and slide it to where you want it to be. Same with the right edge.
Then you will have made space. You click on the space and create a new partition, a drive letter etc.
But nothing happens to the drive until you click 'Apply'. You can stop or cancel anything if not sure.
Once you click 'Apply' then it must be left to complete the partitioning.
This is part of Mini tool partition wizard on my PC, just C on screen, and I right-clicked on it.

I'm defraging right now. Downloaded them both. Really don't yet understand how to use either one. But I understand Minitool,somewhat more. Especially since it has audio telling you what to do. Might give it a try tonight. Now your sure if I make a mistake I wont get blue screened, or end up having my Hard Drive broken up int 5 billion little pieces.