Question External HDD has EFI-System on it, and only has 15MB of aviable space. How to fix it?

[Yinob]

Hello!

I have an external HDD with 500GB capacity, but when I plug it into the computer, it only shows 15MB of it, and it's filled with EFI-System files on it. How can I revert this, so I can have my space back? It was an empty drive as far as I remember. Oh and please simplify it, I'm not an IT genius.

 

[RememberThe5th]

Have you tried to format it? Uess. you have important data on it?

 

[Yinob]

I had nothing on it

 

[SkyNetRising]

Can you show screenshot from Disk Management?