dRofus can write data to the uploaded IFC file. This is done by synchronizing data with the model so that the selected data from dRofus are written to/updated in the IFC model. Examples of such data may be Room Data or Room Properties.
What is important to keep in mind if you have multiple IFC files in a single model is that you cannot export them to a single model. In other words, you cannot merge several IFC files into one valid IFC model. Writing data to or from IFC needs to be done for one IFC file at the time.
You can save the file locally using the option Room ->BIM -> Model connection → Save IFC model