Importing/exporting data vs. connecting to data stores
When you add data to your map (geospatial features, drawing objects, or attribute data), the link to that data is "live." If you are connected to the data store and it is updated, the related item in your map is also updated. If you change the data in your map, you can update the data in the data store.
However, when you import data you get a "snapshot" of the data at the time you import it. If the data changes after that, you will not see any changes in your map unless you import the data again. There is no way to update imported data in its source. Similarly, when you export data, you export the current data only. The connection to the live data is lost.