Remove the memory card, insert into a PC, sort by title and delete dups is what i would do. I dont think there is a sime way to do it on the phone other than one by one.
Sorry to repost here, but does anyone have any instructions on how to move music from Itunes or an ipod to the Torch? Trying to understand how to do it so that I don't have to carry two devices on travel!
Do a Media Sync > Music in DM 6 when you connect your 9800 to your PC. It will sync and transfer everything in iTunes to your 9800.
+1 on the just connecting the 9800 to the PC via USB for dealing with file management.
-1 on doing that by taking out the media card and putting it into the PC. (Why? Much easier just connecting via USB.)
I had the same issue, I reorganized my media files on the computer, deleted music on the card VIA USB and re-synced. It worked great. As Jas mentioned you don't need to pull the card.
DayoungDC, have you set up wireless sync? You can set it up to sync with Itunes, or Media Player. Just do a wireless sync thread search, there is a thread on how to set it up.