I have a new Acer Laptop with Windows 8.1.  8 GB memory  I created a folder and over a period of 2 months well over 200 emails were stored many with attachments.  Suddenly on the 13 June 2014 many of these emails just disappeared, and by chance I have just found them, 150, in the deleted category of storage folders.  Is there a limit to the numbers of emails stored, and should this have happened