Only able to use and see a quarter of HDD storage

[Dx00ab]

I have Windows OS installed on my HP notebook and 1 TB HDD, but when in my windows I see 238 GB as storage, no other disk, not the allocation problem, checked disk management as well but I cannot find it. but in my UEFI while restarting I can see the HDD with 931 GB. is there some way I can use the space on the HDD and increase or partition one more disk from 1 TB one into the windows OS.   Thankyou for you time.

[VH2000]

Is your C-partition 238 GB? Open diskmanagment and make a screenshot.

Probably you just have to format the rest of your drive to be usable.

[Dx00ab · Accepted solution]

That wasn't the problem and it doesn't work [tried 2times] .

but i found a way [Happy,ecitement*100] 

restart you PC go to BIOS or UEFI of your pc 

find your storage device

enter it 

and if you see the disk that has the storage you want[already told in my case that 931 GB]

enter that

reset from RAID and save and exit

restart 

enter disk management and you see it there.

I will try to update if i find any problem but its working fine, and i can't explain how happy I am.

thankyou all *100