i tried to edit my previous post but the website gave me an error and told that an edit cannot be done because the post expired..so i make anoter post

Or try this version :

Make a new folder to  save content in there (there will be  obj,mtl, and another folder Maps generated,so its better to keep them all in  place)

Go to File tab scroll down for Export , choose to export as .obj ,give it a name ,uncheck "Convert maps (for Bryce) and check "Collect Maps" (this will save even the bump maps if you need them).

Make sure you have selected in the scene only what you need ..V4 and not the clothes or lights, also i would do this before to apply shaders, im not sure if daz can save the shaders applied and it wont crash or give error.

If you intend to customize maps i suggest to make a back up of the original ones ,in this way you wont broke or lose original character aspect.