@ashtkon
Oh, if you just wanna keep obj files, you could delete the product but you need to keep the original texture files. As even if you use the option of Collect Maps, some maps could not be exported with obj (roughness, normal, bump...).
If you go for the 2nd way, the original product must remain otherwise you'll lose the geometry and UVs, etc.
Besides, normally the total file size of objs + textures is larger than the original product 'cause dsf/duf files in Daz could be compressed. If you just wanna save drive space, I don't think it's a good way if only keep obj version...