> To me, the word "sync" means to update devices so that the data missing from the other device gets synced.
But that's not what sync means. True sync has a source and a target, and the target's file collection is always made to match the source. If you confuse the source and the target and the "source" is empty, you get the outcome you describe -- the empty device's file collection is "duplicated" (i.e. erased) on the other device that's been mistakenly chosen as the target.
This is a surprisingly common outcome among people who don't fully understand the meaning of sync. If your interpretation were the default meaning, it would be impossible to delete any tracks from your music collection. If you deleted some tracks from the source device, the source would have those tracks restored from the target instead of being deleted from it -- but that's not what sync means.
EDIT: People, don't downvote posts just because you don't understand the topic under discussion. The above description is absolutely, incontrovertibly correct in every detail. Therefore, in a depressing trend, it's been downvoted because it's annoyingly, infuriatingly right.
But that's not what sync means. True sync has a source and a target, and the target's file collection is always made to match the source. If you confuse the source and the target and the "source" is empty, you get the outcome you describe -- the empty device's file collection is "duplicated" (i.e. erased) on the other device that's been mistakenly chosen as the target.
This is a surprisingly common outcome among people who don't fully understand the meaning of sync. If your interpretation were the default meaning, it would be impossible to delete any tracks from your music collection. If you deleted some tracks from the source device, the source would have those tracks restored from the target instead of being deleted from it -- but that's not what sync means.
EDIT: People, don't downvote posts just because you don't understand the topic under discussion. The above description is absolutely, incontrovertibly correct in every detail. Therefore, in a depressing trend, it's been downvoted because it's annoyingly, infuriatingly right.