Could that be possible to separate into different disk mounts for specific customers/subscriptions?
We're studying for some customer/subscriptions that consume a lot of GB of disk space, to have their own /var/www/vhosts/client as a new disk mount.
Plesk Tech Support shared this idea
There is currently no way to transfer individual subscription data to a new location. You can only migrate the entire data of all subscriptions to the new location on the new mounted disk with the /usr/local/psa/bin/transvhosts.pl utility.
But we will consider this requested functionality in upcoming releases if it is popular. Everyone, please continue voting for this feature if you consider it important.