HTC KII0160 - Manual (Page 175)

Experiencing Multimedia 175
Note You can also sync your storage card if you have one installed on your
phone. To set up media synchronization, right-click Storage Card then
click Set Up Sync.
5. On the Device Setup dialog box, select Sync this device
automatically.
6. If you created your own playlists, select your desired playlist(s) from
the list box at the left, then click Add to add them to the list of
playlists to sync on the right.