Datastores sync local

Hi, i have a VM with PBS installed, Could be possible sync 2 datastores in local? (over GUI?)
my scenario: (3 disks)
/dev/sda1 (system of proxmox backup server)
/dev/sdb1 (here, i make the copies with Proxmox Server)
/dev/sdc1 (i want sync with sdb1, i could do it with rsync... but i don´t know if i can over gui.)

Thanks in advance!