It is obvious from your post that you are using DAZStudio and that the content you purchased is exclusively for the aforementioned application. Depending on which library folder DAZStudio has been configured to use, either My Library or My DAZ 3D Library, the contents of the zip file should be unzipped directly into either one of those. Those libraries should be linked to DS and that you know exactly which folder you unzipped your content. Two drawbacks can exist, if the vendor placed all the content folders into one primary folder then you will be nesting within the hierarchy of folders subsequently burying your content deep within the library where the program can't reach it. Or unzipping your content while DS is running, in which case you will need to refresh the Libraries.