Legally, it's "piracy" (infringement) if you acquire copyrighted material from those who aren't licensed to distribute it, even if you already own a legit copy.
Morally and practically speaking, there is no harm, and it's almost indistinguishable from a non-infringing self-made backup copy (unless there are tags indicative of being a pirated copy), but legally there is technically a difference.
Morally and practically speaking, there is no harm, and it's almost indistinguishable from a non-infringing self-made backup copy (unless there are tags indicative of being a pirated copy), but legally there is technically a difference.