My WD HD 430GB was changed to 30GB while i was doing this

I was trying to reinstall my free upgrade of windows 10, there’s a tool from Microsoft i downloaded to keep a license copy of Windows 10 for installation.
I have followed the instructions and somehow i done one mistake by selecting my external HD as USB flash drive

Here’s what happened once it start the processes:
i was listening to music, then everything stops
It does what it appear to be deleted my whole data on my external WD HD 430GB without any warning messages,

later on it asks me can we format your external HD ?
i respond “NO WAY” , then when i looked at the drive i can’t find my entire Data

I realized that the software have converted my external HD to USB flash drive
and it changed the capacity from 430GB to 30GB and gave it totally New name as well .

my computer only recognize the 30GB with the new name

Things i have tried:
i have contacted Microsoft support they say the software won’t delete your data but they can’t support me with this issue.

I downloaded the Data lifeguard
it detected my other 400GB thanks
The quick test pass

but i still don’t know how to get my data back ?
and if i get to the worth case scenario how can i bring it back to factory default

If somebody can help with this , help is appreciated

Thank you in advance

Hello,

I believe you will have to try using a data recovery software in order to recover the data and then format the drive in order to recover the full capacity.

I’m not sure how much to trust the Data recovery software or which one is the most trusted, i never used it before

Even if i get to the point of formatting the drive, the rest of the drive itself is not appearing ,
I can only see the the 30GB thing.