This is for POP email. The displayed inbox size is incorrect. With my Inbox empty, "Show folder size" shows 10.6 G in left panel of display. This exceeds max folder size of 4G so something is not working correcty. In addition, MBOX Inbox in Thunderbird Profile also shows 10.6 G. This is important to me because this large file size is preventing me from loading Profile on to flashdrive for purpose of migrating to a new computer. Flash drives wil not accept it and give an error message. In addition, I don't want to start a new installation with bad data.