Mail freezes on exporting mail folder
10.10.5 Using mail and it is slowing down a fairly new imac, 27" late 2014 with 16gb of ram. I want to make my mail DB smaller, i have a folder called Completed projects i would like to archive. Im trying to export the folder and then i can back it up with Timemachine. I do not need access to these emails very often. When i would try to export the folder, MAIL would freeze, so i subdivided the folder into 4 sub folders 1,2,3,4. So i exported sub folder 1, and still over night activity in mail showed Preparing to Export, but it was just frozen, i opened activity monitor and it had 63gb of ram in it.
I might just use Google take out for the archive, but why is mail acting so funny?
OS X Yosemite (10.10.5)