How to manually upload ringtones and notifications to DroidX? I've created 2 folders on the root of the SD card,


Ringtones
Notifications


and placed one mp3 file within each. When I disconnect the DroidX from the USB cable and navigate to either "Settings" > "Sound"> "Phone ringtone", or "Settings" > "Sound" > "Notification ringtone", neither mp3 file shows up. 

What am I doing wrong?
You don't need to make your own folders. 

The proper file to put the mp3s is /system/media/audio/ - where you will find folders for /alarms , /notifications , and /ringtones

There are two things to keep in mind when doing this: 


If you are using full-sized .mp3's , you will put considerable strain on the system when it comes time to load one. In my experience, two minutes of mp3 works fine for an alarm, but such a file takes a few seconds to load, and will not make for a suitable ringtone, unless you trim the file first. 
You will have to re-do this every time you flash a new ROM. 


An alternative to this -- is to have them in /sdcard/media/ -- 
But if you have an older device, having them in the root directory allows for better performance. 

HTH!