You can drag objects around and into folders using the project browser. Holding the control key while dragging an object will move it into any object you drop it on. Dropping an object on one of the top tabs will allow you to move an object to a parent folder.
Once the ‘Devices’ folder has been created by the wizard, you can rename it or move it to another folder location. Should you later choose to import more devices, then Podium will search for the location of the devices folder.
You should be careful of moving things around that are placed below a Device Definition object though, as this folder structure is required for presets and parameters to be accessible in the arrangement panels.