externally
adverb
[ ɪkˈstəːn(ə)li ]
• with reference to the outer surface or structure of something; outside.
• "the antenna should be mounted externally, perhaps on the roof"
• used to indicate that something occurs or comes from a source outside the institution, country, or subject affected.
• "most exam papers are marked externally"
• using a disk or tape drive rather than the main memory.
• "all data that has been stored externally will be easy to retrieve"