title_body: Can you defragment a Kindle Paperwhite?
upvoted_answer: To defragment a filesystem you need a software that does that.
  
  All you have to do to defragment the memory of your Kindle Paperwhite is to connect it to a PC/Mac and run a defragmentation utility on that drive.
  
  Edit: Being a flash drive though, as @Daniel suggests, it's actually not a good idea to defragment it, because there will not be any real benefit in terms of performance and actually doing it many times will shorten the life of the memory of your device.
  
  There is always something to learn out there!