I have a sch-r450 and i have a memory card but when i sync the music to the phone nothing happens
The problem is that the Samsung r450 needs to be hooked up to the computer as a mass storage device. When you first plug the phon into the computer, a box will pop up saying "found new hardware" Just click cancel. another box will pop up, just close it out. Once you do that, the computer should recognize it as a mass storage device and you should be able to go into My Computer and see a drive for a removable device. Open that up and there should be 4 folders, music, pictures, ringtones and sounds, I think. Just drag and drop music into the music folder and ringtones into the ringtone folder.