ok here goes. i have just tried this and it works fine but i will add a bit to it to hopefully help
Using your "My Files", in the directory of you sdcard, tab on the Menu key and select [Create folder], named it Media.
Tab Media folder, then Menu key and select [Create folder] again, name it Audio.
Tab Audio folder, then Menu key and select [Create folder] again, name it Alarms. Than another one Notifications and another one Ringtones.
1. open applications.
2. scroll through to find my files.
3. press menu button (bottom left of phone)
4. press create folder
5. in pop up box type
media then ok
6. now press
media to open folder
7. repeat step 4 and name the next folder
audio8. open
audio folder and repeat step 4 and name it
notifications9. do not open
notifications but repeat step 4 again to add afolder
ringtones and another folder
alarms10. now connect to pc using usb cable. on my computer it asks what i want to do and i select open folders. (you may have to look in my computer if not) you should see the folder
media which you created. open up
and you should find
audio. open this to reveal the three folders you created. open
notification now find your mp3 file on your computer, copy and then paste into
notifications11. disconnect cable, go into settings, press sound, press notification ringtones and it should be there
oops just noticed this is in the galaxy s section not s2.
