How do I fix extend volume on my new cloned drive?

[N7_RiZe]

Hey all, over the past few days I've upgraded my drives from a dying 4tb SSHD to a Standard 4TB HDD and now also changing my 2tb and 500gb HDDs to a second 4tb HDD.
The 4TB drive cloned fine and I've seen no issues. However my 2nd 4TB drive, which also appeared to clone fine, will not let me extend the 2TB volume for me to transfer the 500gb drive's files over.
I've tried repairing the main partition and that did fix some apparent corruptions but not this issue. I also tried EaseUS and GParted. EaseUS did nothing and GParted did attempt it but wanted me to repair the partition in windows but again that did nothing but fix a few corruptions.
The drive currently has 2 partitions, F, E and the unallocated space. F being system reserved (I honestly have no idea what this is used for as I use my SSD (C:) for Windows, but it has a few recent files and it's only 100mb so that's ok to leave as is) and E the 2047.90gb volume. Since it's over 2TB, you can see that I managed to increase it but only by a little.
I also tried merging the 2tb and 500gb partitions but that corrupted the whole drive and I had to clone the original again.
How do I fix this issue?
Thanks.

[Windows7ge]

Are you using MBR or GPT? MBR has a max partition size limit of 2TB. You need to convert it to GPT to create a partition >2TB.

[N7_RiZe]

Thanks for that, yes it was MBR, I'm surprised the Google searches I did didn't explain this. First I tried diskpart but that errored on me, but I installed AOMEI Partition Assistant and that converted to GPT fine. No unallocated space now!

[Windows7ge]

1 hour ago, N7_RiZe said:

Thanks for that, yes it was MBR, I'm surprised the Google searches I did didn't explain this. First I tried diskpart but that errored on me, but I installed AOMEI Partition Assistant and that converted to GPT fine. No unallocated space now!

If you have any other problems let us know.