I have a SSD with only 120gb on my mac pro. Just noticed that gmail on my apple mail takes up 27 gb of space. I have had lots of mail over the years and same email address. Gmail online allocates only so much space for me. I have other HDD also installed in my system. Just wondering how to get apple mail to detect new location of mail folders if i move my current mail in ssd to one of those drives. I did it once and had some errors so not sure so reverted it back to ssd.