Excuse me, in which folder are the SMS messages stored in Nokia phones?

This requires software, and file management can't see it at all! !

If there is "My Computer", you can see it in it! But they are not in txt format, but exist in another document! !

There are two specific locations: if the information exists in the memory of the mobile phone, it is on disk C /system/mail;

If it's on the memory card, it's on the Z /Mail disk.