Where are the text messages stored in the system directory?

Generally, Android phones have four ringtones that can be set, namely: incoming calls, text messages, alarm clocks, system ringtones, etc. The specific setting method is: 1. First open the SD card of the Android phone, and root the card. Create a "media" folder in the directory, then open it and create an "audio" folder. 2. After opening the "audio" folder, create "ringtones" (incoming calls), "notifications" (text messages), "alarms" (alarm clock), and "ui" (system prompts) in it. 3. Then store the ringtones into these folders according to your needs. Then restart your phone! 4. Open your Android phone and go to "Menu" - "Settings" - "Sound" to make your own selections. Important tip: After creating the folder, put the ringtone you want to set into the designated folder, restart the phone, and then go to the settings to find the ringtone you put in! (SMS ringtone setting method → ??Enter the SMS → Press the menu key → Enter the settings → You can set the SMS ringtone)