Should I delete the message?

As everyone said, keep what is useful and delete what is useless, because listening to friends says that if you save more text messages, you will get more electricity! I have never done such an experiment! Personally, I think that saving too many short messages will affect the running speed of the mobile phone, just like there are too many things on the C disk of the computer, so it can't run. Just a feeling. Experts scold me!