Hey Adrian,
When bringing in footage from Premiere or FCPX, Resolve does normally pick the right folder. The easiest way to figure out if it did or not, is to (assuming you're in the Edit module), simply open the Media Pool, select a clip, then open the Metadata window, and take a look at the resolution of the clip. What you'll also see in the Metadata window is the location of the file, which will help you narrow down if it's coming from the correct folder or not. With that being said, you will definitely want to use the Original Media, and not the transcoded media. Let me know if you have any other questions
KPM