to make life easy just unzip then and they will find their home. Daz file system is WAY better than Poser. However, I set up my own system to organize characters and poses.
Once you see the file system you can mess with it a bit but "I" would leave the runtime and data folders alone.
To find the folder:
1. Open Daz studio
2. Under Edit, Click on Preferences
3. Click the Content Tab
4: Click on Content Directory Manager...
5. Click the + next to DAZ Studio Formats