To mount a usb drive, e.g. drive d:
sudo mkdir /mnt/d
sudo mount -t drvfs d: /mnt/d
To unmount:
sudo umount /mnt/d
Drives formatted as FAT, ExFAT or NTFS can be mounted in WSL.
The mount method metioned above doesn't work in WSL2
Workaround is to run the following in a Linux folder:
explorer.exe .
Please note that there is a dot "." at the end.
In this way, you can use Windows "File Explorer" to move files between USB drive and Linux folders.