Ok i think i understand your problem, but first try to use another translator, one like
https://www.deepl.com/translator because is hard to comunicate concepts when someone is not native with the forum language.
On the subject:
1.- Format again your usb drive (in this case the 4GB one you are using on vWii) in Fat32 with 32 cluster size.
2.- Use wii backup manager to copy the game to the drive.
3.- Start the Wii U in vWii mode or change from Wii U to vWii menu.
4.- Now In the Vwii mode, connect the pendrive on the top usb connector in the back of your Wii U console.
4*.- That is the only conector the Vwii accept for usb drives, no other one.
4**.- Dont use the front usb conectors or the bottom one from the back because they arent recognized in Vwii.
5.- Open your favorite game loader and load the game with the apropiated cios.
6.- When you are done, return to the vWii main menu and unplug the usb drive.
7.- Change to Wii U mode now.
7*.- if you keep the usb drive on Wii U side ,it will be formated to a Wii U device and it will be useless on Vwii again.
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For the Wad problem, the first and most important is to not install dubious WADs in the console or you can corrupt the vWii nand or worse, you can brick it. (Even worse if you are using a real wii too).
I could sugest you to delete the mk Wad you installed but at this point i dont know if that solution could have consecuences in corrupting your Vwii nand, so i leave to others to give you better advice on that matter.
