Windows 10: 1TB SSD won't back up to nearly empty 4TB HDD

I have a PC that I built to double as my wife's work computer and a file/media server for the house. Her work is mainly web based so it's not very resource intensive. She said its been bogging down lately so I logged in to see what I could find. The giant red flag for me that I found is that it has never successfully run a local backup. OneDrive backups seem to be working fine.The box has two 1TB SSD's and two 4TB HDD. I think I have it set up via Storage Pool to mirror one SSD to the other then backup to one of the HDD with the second HDD creating a backup there too. Long story shor

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Ugrading my 1TB MBR HDD to a 4TB GPT SSD

You should do steps as follows

1) clone 1TB hdd to SSD

2) run mbr2gpt utility to convert ssd to uefi

Convert Windows 10 from Legacy BIOS to UEFI without Data Loss

3) extend 1tb partition on SSD to 4TB using tool like Easeus Partition Master (free version is ok).

Step 2 is the critical step.

 

Ugrading my 1TB MBR HDD to a 4TB GPT SSD

Didn't work.
When I cloned the hdd to ssd, I could boot from the ssd.
When I ran the mbr2gpt tool (following a guide) after booting into the ssd, it says the conversion was successful but couldn't update reagent.xml. Disabling and enabling it didn't help. I didn't think it was a big deal.
Anyways when I changed to uefi, windows boot manager was #1 and Onboard NIC was #2 and #3, I ended up in windows repair and couldn't get out, so I just boot back to my hdd and here I am.

 

Ugrading my 1TB MBR HDD to a 4TB GPT SSD

Hi I need help. I spent an entire day trying to figure this out only to fail so I need help.
I want to upgrade my 1TB MBR HDD to a 4TB GPT SSD.
What I have: Partitions in order
1TB MBR HDD: System Reserved 500MB, (C 930GB, Recovery Partition 482MB
4TB GPT SSD: Unformatted Primary 16MB, System Reserved 500MB, Recovery Partition 482MB, (E 3725.05 GB

So what I tried to do was use Macrium Reflect to clone my 3 partitions over to my SSD (in a different order so I can extend volume) and it worked.

Now I restart my computer, enter BIOS, change my boot mode to UEFI, save and restart again, only for the computer to go in automatic repair mode or something. When i tried to enter BIOS again, the Boot Order was just
1. Windows Boot Manager
2 & 3. Some kind of weird thing, disabled, not my SSD or HDD.

So I change my boot mode back to legacy and here I am. I obviously missed a step and did something wrong, so please help.

I don't want to reinstall windows. I just want to move everything (including OS) to my ssd, and that's it.