Android allows us to store files in its file system which is quite similar to any other Linux filesystem that you must have experience with. Using the java.io file input/output APIs we can start reading and writing files to the Android filesystem. This is super useful when you want a store files (but not relational data or some sort of key/value cache pairs) on the device. Files like audio, video, images, documents, etc. all makes sense to store in the file system when required.
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