There is an old thread from 9 years ao where this is discussed ad nauseam. See Digital copying. This is a topic that seems to come up every few years, with the same arguments being made on both side. I have no desire to rehash these old arguments but I would refer those who are interested in some of the case law to my posts 50 and 61. The latter cites to a federal court of appeals decision that held “space shifting” to be within fair use. In particular, they were OK with making MP3 files from CDs that had been ripped to hard drive.