I created a primary dataset (say called MainDataset.pbix) that stores all the power query transforms pulling data from different sources. I uploaded to Power BI Service to use as a dataset. I have other Power BI Desktop files to connect to MainDataset, but I noticed I can only have that data and that data alone, I want to be able to create tables and have other datasources and unable to do so. Is there anyway around this? Should I store my dataset in Excel instead?