Fix HDD partitioning

I purchased a 4TB WD caviar black HDD to replace a 1TB drive that was ringing out of room. After a success install I used Macrum Reflect to clone the original disk to the new disk. When it was done I had a partition on the new drive that was the same as the old with 2 unallocated area. I believe I deleted the copied partition and now I have 2 unallocated and I can only format the 1st not the 2nd. The expand partition option is grayed out. How do I return the drive to one large partition? Am I having this problem because the system in using MBR vs GPT?
After it is fixed what is fastest way to copy the data from old to new? Is dragging the files to the new drive the best option?

To use a 4tb HDD a OS boot drive, OS will need be install in UEFI mode.

I personally would still use the smallest HDD for OS in UEFI mode.

whs,
Thanks for your reply. The drives in question are data drives not the system HDD. I don't care if I lose all the data on the new 4 TB drive I just want to format it as one large drive. I'm not home to sent a jpg of the disk manager but can later tonight.

1) Just use CLEAN the drive.
Disk - Clean and Clean All with Diskpart Command

2) Open DM, & set drive up GPT.



3) Make a partition or partitions to suit.
Partition or Volume - Create New

theog,
Thanks that is exactly what I was looking for but couldn't find when I did a search. I try it later tonight and report back. Any idea on the beat way to transfer 1 TB of data to the new drive from the old one? Both are in the computer at this time. Am I stuck with just a straight file copy?

MBR = 2.??tb

Paragon will clone to a bigger Partition, but MBR to GPT unknown.