Move Mail data to external hard drive

i have discovered mail folder absolutely massive , move external drive instead of keeping on internal hard drive. know how this?

thanks.

 

ok, apparently lot more wrong having lot of messages...i knew had when noticed how of hard drive dedicated mail. heres full story: hard drive filling , forced external drive store data on. decided partition half , half , use time machine backup device. after got set up, decided time figure out put on new drive downloaded "disk inventory x" figure out large , moveable. opened up, apparent absolutely massive, on twice big iphoto library. wondering huge, on @ key , find massive part of harddrive 400 gigabytes of mail files, leading me post thread. back, silly assume had mail, sure hard drive wasn's lying decided move new external hard drive. after posting this, decided continue digging thinking maybe find sort of answer problem on own, , came across this: http://forums.macrumors.com/showthread.php?t=1027800&highlight=harddisk+is+suddenly+full. near bottom of thread mentions brand new hard drive filled no reason, , turned out sort of massive recovery mail folder. decided examine recovery box folders more carefully, , found 1 of them 300-something gigabytes large(i not sure if related gmail folder). when began browse through folder, realized, shocked, contained 4 smaller still huge folders, each 1 containing tons upon tons of copies of same email. 1 of emails took 2 folders copies, 1 took 1 folder, , attachment took 1 folder. same "recovered" emails. 400 gigabytes worth. after deleting copies except 1 of each email, have freed 396 gigabytes on "full" hard drive in seconds. didn't delete last of each file because i'm curious see if start duplicating again. if notice hard drive filling bizarrely fast, suggest check library/mail/v2 , check how big each "recovery" inbox in case has happened you.

 

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