The next step is to delete any apps and files that you don't need or use anymore. Apps can take up a lot of space, especially if they have updates, data, or cache files. You can uninstall apps that you don't use or that are redundant or outdated. You can also clear the cache and data of apps that you use occasionally or that generate a lot of temporary files. To do this, go to your settings, apps, and select the app you want to clear. Then, tap on storage and clear cache or clear data. Be careful not to delete any important data that you might need later.
Files such as photos, videos, music, documents, and downloads can also take up a lot of space. You can delete any files that you don't want or need anymore, such as duplicates, screenshots, memes, or old files. You can also move some files to other locations, such as your computer, an external drive, or a cloud service. This will help you save some space on your smartphone and also back up your files in case you lose or damage your device.