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ASUS ROG Strix Z390-E GPT drive not showing after GPT recovery policy set to auto

Level 7
i have a ASUS ROG Strix Z390-E with bios 1502. I plugged in a drive that had worked with it for years ( its a storage non OS drive. 6tb nas drive ) . I recently installed my system is a larger case. After i got everything plugged in , I got a boot message on the bios screen (GPT header corruption has been detected). It advised me to enable (MBR/GPT) Recovery policy to allow it to rebuild / recover. I did this and it booted and i could see the drive. A few reboots later , the drive no longer shows in my computer. In drive management it shows (disk not initialized and doesn't show the capacity of the drive. ) When i try to initialize it , it fails. Please help me. I don't want to lose any of my data. How do i fix this ?

Windows 10
No recent bios updates
Drive also doesn't show in other pc's , even is usb enclosures.

Level 7
I just wanted to add that it sometimes shows up in the bios , And some times not. Any help here would be greatly appreciated.