Recovering data off EFI System Partition

[ElectricWizard]

Good day,

After a stupid mishap with dual booting Ubuntu and Win 10 (installed Ubuntu on different drive than Windows by accident), I am left with Windows on my C: drive, and the residual Ubuntu crap on my media drive (H: ). I ended up not being able to boot Windows because I was using the Grub bootloader, which couldn't find Windows. I stupidly decided the best way to get rid of Ubuntu and to boot back into Windows normally was to just delete the Ubuntu partitions on my H: drive. Now the whole drive is an EFI system partition. I was only able to boot into Windows again after booting from a Windows 10 USB drive and using diskpart to repair the boot files. So now I am stuck with an H: drive with 1.5 TB of videos and music that I cannot access.

My question is, is there any way of converting this somehow to a regular disk and having my drive back? Or at least being able to access the drive so I can get my stuff off of it? I have mounted it, but get an error when trying to access the drive (see pictures). I know I can just reformat the drive and make it a 'normal' drive again, but the object is to either keep or somehow save the videos and music on the drive.

Here are my partitions and the error I get when accessing the H drive: https://imgur.com/a/GOcY1

Thank you in advance

 

[Colif]

IS/Was H on drive 0? I don't know if there will be anything on there to rescue as if you look in disk management, its 100% free or close enough, the efi files aren't that big

You can try these to see if anything remains: https://www.lifewire.com/free-data-recovery-software-tools-2622893

What I would do is remove drive 0 from PC, run the commands to rebuild the mbr on drive 1, it should add the files necessary into C drive as you don't have to have an efi partition, just as long as you have the necessary files for UEFI BIOS to boot. If you can get win 10 to boot without hdd then you can delete its contents using diskpart (booting off installer helps) and clear drive and format it again

 

[ElectricWizard]

IS/Was H on drive 0? I don't know if there will be anything on there to rescue as if you look in disk management, its 100% free or close enough, the efi files aren't that big

You can try these to see if anything remains: https://www.lifewire.com/free-data-recovery-software-tools-2622893

What I would do is remove drive 0 from PC, run the commands to rebuild the mbr on drive 1, it should add the files necessary into C drive as you don't have to have an efi partition, just as long as you have the necessary files for UEFI BIOS to boot. If you can get win 10 to boot without hdd then you can delete its contents using diskpart (booting off installer helps) and clear drive and format it again

Yes, H: drive was disk 0 at the time of installing Ubuntu, which is what caused the problem in the first place. I've been trying to fix that but it is not working out either.

This image shows that H: drive is not full, and that it appears that my files still exist on there:
https://i.imgur.com/P1QKOUn.png