Creating Data sourge from Power Bi

Hello,

I got send a .pbix file and i could open it in the Microsoft power bi desktop.

But I dont have a source file behind this data. 

So when i refresh data i get the error that it could not find path.

Is it possible to create a .csv data source wich i can edit from a excisting .pbix file?

Im looking forward to your reply.

greetings,

RGrimme