Hi Maarten, 

You could consider creating a sort of attachment table and upload files there, then link these attachments to other records in your application. Would that suffice?

Hi @Mark Jongeling 
 
Its a solution but i think its too much of a work arround for this situation. Are there any other ways?

I don't really know a different solution to this other than my suggestion 

It's the same kind of solution Thinkwise made for the Software Factory with the icons.
Maybe you can expand this with a handler concept to work around the lookup table.

When uploading a file to an external storage such as disk, ftp or a cloud storage, you can easily share the pointer (url/path) to the file between various records by simply copying the pointer value.