Nobody is perfect and Android neither.
Apps you have already deleted, sometimes leave data behind.
The system constantly creates logs, crash reports and debug files you don’t really need.
Your SD-card is collecting files and directories you don’t recognize.
Lets not go on here…
Why not get a maid to clean it all up?
SD Maid will help you keep your device neat, clean and tidy :-)!
Give it a try, you won’t find a more thorough cleaning tool!
Choose a tab, press start and then either click a single item to delete or press the clean all button. It’s just that easy.