Every mobile will have a storage capacity within that you can store how much you want. The device will have a storage capacity if you go beyond that then you cannot store anything after that. The more space will be occupied in the mobile by the messages that are being done for the whole day.
In the past times, people will call or they will use the letter for communication when mobile phones got introduced people started to call others for communication and in recent times people are making use of the messages for communicating this is being done for the whole day.
The text messages take up storage in a high amount so you have to delete some of them to free up space in it.
You can even have the backup of the message that is being done. Some of the people will not like to delete their messages, they will like to have them as a memory in that case if you have no idea how to save them as well as free up space in mobile you can directly sync them to the Gmail account.
On deleting text messages free up space and you can add some of the other files which you would like to add in it.
Other than the messages there are some of the other things which will also occupy a large space those are photographs, applications, games, videos, and still, there are many more.
When you do messages in a normal message app they will occupy a normal space but when you are texting messages with some other social application there is where your device will drink a lot of memory.
In the free times, you will like to hear songs so that you will download many songs and these songs will contain some of the space and they will need more space in the device.
The text messages use memory and more than those other apps and many things in the device will take more places in it and finally, you will be left with no space in the device.
Bottom line
Every device will contain a minimum amount of space in which you can only store that much of memory. If you do not know about it then you can check them in the storage column.
You have to find them and you should clear them in every particular interval so that you will not suffer at the end.