installed on usb but only shows as 4gb?

[qwertyjjj]

In this case it's a problem of Pendrive, not of Knoppix.

I would suggest to use the Knoppix methods.

The size of the overlay (file or partition) depends on what you want to store of personal Linux stuff - configuration files, additional installed tools and so on. The remainig part within the FAT32 partition you can also use under Windows. I recommend to create a new folder in the directory 'mnt-system' and call it for example "privat_Windows".

I don't use Windows much anymore. I need the space to install a game.
There must be a way to increase the size from what it is now?
I alreday increased the partition size using gparted but knoppix still only recognizes 4gb.