Micha Roon

as to your question: the fileInfo is passed from the client. If there is no name, then the client did not provide it.
The Meteor method does not care where the data comes from. You could just as well use this method the store some user input in a file on the server.
My point is: check the call on the client.

You might get more answers by posting your question on stackoverflow

@daslicht did you follow pascoual's tip? I guess it is required if you have a binary file like an image.

thank you Julian. I have corrected the method name