I have so many worries from checking out the forum; am really quite worried about this new "upgrade".  I really don't understand why Microsoft just didn't leave well enough alone OR check things out further; it would seem that with all the concerns that an organization such as Microsoft would just go back to the old way!!  HOWEVER, BECAUSE I AM BEING FORCED TO UPGRADE I HAVE QUESTIONS....... Answer I received was not fully helpful nor made sense (not a techie here) and maybe that is because I didn't ask it clearly, so I am going to reword it and ask again. The previous answer was "shouldn't" however that definitely is not giving me assurance. 

I have the old hotmail (which I do like very much!); I have my inbox, sent, etc. but I have also created about 15 folders (organization purposes for mails); when the AUTOMATIC/FORCED UPGRADE occurs - Am I going to lose all those folders and all the mail that is in each folder???

It appears from the forums that individuals are not getting all their mails or attachments so I am quite worried. 

I have been trying to save attachments to each of these mails over the years, a monumental task, but I am so fearful that I will lose important documents attached to the emails.