title_body: Is it possible to use Amazon Kindle without signing to a non-free unlimited cloud storage plan?
upvoted_answer: The Amazon Send to Kindle service has been around way before the Amazon Cloud Drive was introduced. Amazon automatically adds any personal documents sent through "send to kindle" to its cloud drive (which is included for Amazon Prime members and fire device owners).
  
  This supplementary feature would not be anymore available without an Amazon Cloud Drive subscription. Nevertheless the actual send to kindle feature is not affected by this change and would still work without such an additional subscription. Some months after switching to the paid subscription, kindle documents aren't any longer included into the amazon cloud quota.
  
  An extensive disucssion about this notification email and the resulting consequences can be found on mobileread.com