Media files can take up a huge amount of space on your device's internal memory, the better the quality, the more space the file needs. HD videos are your worst enemies, but music and photos also occupy a vital space.
Applications can range wildly from a few megabytes to about 8 GB like Final Fantasy IX. FFIX is basically a snowstorm in this scenario and can really hurt your chances of survival.
Google Play makes it a lot easier when it comes to knowing how much space a file needs (there's a category to see the size of apps in the Play Store), but you can find that out by going to your Android settings.
Some interfaces make it easy to know file sizes, just go to Settings > Apps, where you can see the size of the apps. Some files may require an extra application, such as file managers, such as ES File Explorer, which is also very useful for managing all types of folders.
It is not necessary to carry a scythe if it is a work account knife. In other words, if you don't have a device that reproduces the quality of 4K resolution, why shoot in that resolution? Think beyond, how will you see the photos and videos you created?
Earlier I mentioned the quality of the music on your phone, and the same thing with the photos. If you are viewing your images from your phone or a computer with standard resolution, decrease the number of pixels.
If your smartphone is an ecosystem, the micro-SD card is your backpack. This is the extra space you have to carry what will not fit in your pockets. You can transfer various file types such as images, videos and even some application data to the micro-SD card. But unfortunately not all Android devices support a microSD card.
You can move data to the Micro-SD card by going to Settings > Apps > (Application Name) > Move to SD Card. Not only are all applications that have this feature, but this feature allows you to redeem a few precious megabytes from your internal memory.