iTunes playlist question I have altered my iTunes playlist on my PC because I had to get a new computer due to some hacker putting a crypto lock on my hard drive. I never used the iCloud to back up my playlist and thought that I was backing up my playlist properly on an external hard drive. Turns out that I never backed up my playlist properly. I lost everything! So, I  painstakingly loaded all of my CDs into my playlist on my PC. I also went through the trouble of eliminating duplicate songs, which I had never done before. I still have my previous playlist on my iPhone and iPod. Since I am so ignorant when it comes to this stuff, I didn't know if I could have backed up either my iPhone or iPod to the PC playlist instead of importing all of my CDs again to the PC playlist. So, I went through the agony of importing the CDs. I actually have no knowledge on how iTunes playlists work. Now that I went through the trouble of importing all of my CDs again and eliminated the duplicate songs.


if I plug my iPhone into the tower and sync and backup my iPhone, will the syncing replace my new PC playlist with my iPhone playlist?
And, will the syncing also put songs and albums that are on my iPhone, but not on my PC playlist, from my iPhone to my PC playlist.
Your iOS device only syncs with 1 computer, if you gonna sync on a new computer, your music on your iOS device will be replaced with what's in your iTunes Library on computer.

You can't sync FROM your iOS device to computer, because of copyright reasons, eg. I buy music and sync them for all my friends' computers. That's a no-no! :P