Windows on 525GB drive is stil installed in legacy mode.
It has legacy bootloader (500MB System Reserved partition) on it.
But your 2TB disk has UEFI bootloader on it (100MB EFI System partition).
If you wish to make 525GB drive UEFI bootable then
1. Delete newly created 475MB logical drive.
2. Delete extended partition (green color area in Disk 0).
3. Shutdown and disconnect 2TB HDD.
4. Boot into windows in legacy mode.
5. use
mbr2gpt to convert 525GB drive from legacy/MBR to UEFI compatible. Validate first before full conversion.
Execute from elevated command prompt.
mbr2gpt /validate /disk:0 /allowfullos
mbr2gpt /convert /disk:0 /allowfullos
https://www.computerhope.com/jargon/e/elevated.htm