I have been sitting on this "how to" for years as I personally was personally hoping NI would implement a global search feature allowing users to search their user and factory libraries easily. This still has not happened after 4 years of patiently waiting so here is the easy way to move your user NKS files into the Factory Library!
Welcome to the UVI World Suite Collection NKS Browser Library for Native Instruments Komplete Kontrol / Maschine
Welcome to the UVI Grand Piano Collection NKS Browser Library for Native Instruments Komplete Kontrol / Maschine
Welcome to the Vacuum Classic NKS Browser Pack for the Native Instruments Komplete Kontrol / Maschine software and hardware
Welcome to the Air Music Technology Boom NKS Library for Native Instruments Komplete Kontrol / Maschine software.
Welcome to the SONiVOX Orchestral Companion Woodwinds NKS Library for Native Instruments Komplete Kontrol / Maschine
Welcome to the SONiVOX Orchestral Companion Strings NKS Library for Native Instruments Komplete Kontrol / Maschine
Welcome to the SONiVOX Orchestral Companion Brass NKS Library for Native Instruments Komplete Kontrol / Maschine
Welcome to the SONiVOX Eighty Eight NKS Library for Native Instruments Komplete Kontrol / Maschine
Welcome to the reFX Nexus 4 NKS Library for Native Instruments Komplete Kontrol / Maschine