How to remove files from rrds directory of Zimbra server?

Question

Zimbra

Good afternoon!
There is a server with Zimbra 8.0.6
937GB of space is occupied, 20 gig is free.
/opt/zimbra/logger/db/data/rrds occupies 427GB
/opt/zimbra/store occupies 388GB
On the forums I saw that since 8.0.7, the glitch with the logger has been resolved. but I don't have a place to transport a terabyte of a mailer, I have 550 at best. That's why the stick - from one end it is necessary to update, from the other to solve the problem with the place and ... a vicious circle.
How to delete these logger files so that nothing happens to Zimbra?