Internal SD only shows 10gb.

Hey everyone. So I've unlocked, rooted, and flashed a custom rom. After doing all this, it shows my SD card is only 10gb. I've tried a factory reset, and wiping internal SD, but it still only shows a max size of 10gb. Any knowledge on how to fix this? Or is it just fubar'd?

10gb system data help

Hello i have an Lg G4 32gb my ''system data'' is 10gb and ''others'' also 10gb that seems a lot to me any suggestions how i can clear some gb's ?
THANKS!