Disk space / backup place

Hi Guys,

I recently bought the complete package Zextras and configured the Backup Zextras.
A few days later I get a message that I have only 30GB free on my OS/Zimbra partition.

When I set up the Zextras pointed in the GUI:
Backup path: / mailbox2/backup/zextras

# df -h
Filesystem Size Used Avail Use% Mounted on
* RAID 1 SO and Zimbra Installation
/dev/sda1 249G 207G 30G 88% /
tmpfs 20G 0 20G 0% /dev/shm
* RAID 5 with 3x 2TB disks
/dev/sdb1 1.9T 299G 1.5T 17% /mailbox1 - zimbra store partition
/dev/sdb2 1.8T 527G 1.2T 32% /mailbox2 - backup partition

I found a folder /opt/zimbra/backup/zextras with 194G! can I delete this folder without cause problems on Zextras Backup?

Regards