ErpNext Disk space and Bandwidth Allocation

How to allocate or manage dick space and bandwidth for a multinants in one SSD?

That features is not available out of the box.

I Have installed Erp next on a server i have got 20 gb disk space for every droplet there has two droplet …
i wanna allocate this disk space and bandwidth for every specific droplet of Erpnext .
i need this actual solution .