2012-11-25 20:08 - edited 2012-11-25 20:10
You don't say whether stored upon phone memory or microSD but basically you need to establish what is currently synched using Windows Phone for PC or Mac, uncheck unwanted content and it will be deleted from device; you can also access media content upon microSD only using File Explorer upon PC.
Symbian specialist until 31/01/2013 with interests in Maemo & MeeGo but an aversion to Windows!
Welcome to Nokia Support Discussions!
If you want to remove some of the synchronised tracks or albums, you can do that in Music+Videos. Just browse to the track or album you would like to delete, tap and hold until a selection box appears and tap delete.
You did not mention if you use Mac or Windows, but since you synchronised from iTunes, I am going toassume you are a Mac user. On Windows Phone App for Mac, go to the music section and untick artists and albums you do not want to synchronise, this will automatically remove them from your phone.
Hope this helps!