One annoying thing is accessing files that you have in your WSL, because they are quite hidden. To make it a little easier lets create a link or to be precise a junction to it.
- Open a CMD.exe as Administrator
C:\>mklink /J Ubuntu18.04 C:\Users\%USERNAME%\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc\LocalState\rootfs\
- Access the Linux filesystem through C:\Ubuntu18.04