It can't work with network shares or non-ntfs volumes though.
you know, i just noticed this... my ExFAT SD Card is not visible... hmmm....
I think this is because WSL uses NTFS Alternate data streams to store linux file attributes, and they don't survive when a file is copied to a non-NTFS file system.
No, I don't think so. Alternate streams are only used inside the emulated Linux filesystem, not externally.
You may have to mount it manually.
This was true in previous versions, but with the Fall Creators Update you can mount mapped network drives inside of Linux:
sudo mount -t drvfs z: /mnt/z
Now that's pretty cool. It even works for removable fat32 media!