SMS doesn't have enough storage space.

I suggest you connect the PC suite with your mobile phone first and see the space on each disk. You can use the kit to back up the useful things you want to take out of your mobile phone to make room. Or you can go to the forum. There are many experts. It's really bad. Just go and see. I made two copies of N73. I tell you from my personal experience that important documents must be like phone books and various documents. I just lost the lesson of blood once!