WeeBoo

Hello, I created my setup a few month ago and it works perfectly ! I am running Unraid and created a VM using redpill. Following the tutorial, I created a disk (.img file) that is on a USB external drive (my host doesnt have SATA port). My question for today is, is it possibe to increase the .img size, ideally I would like to fill all the space of my USB disk. And do that without loosing my Synology data. Do you have any idea for the way to do that ? Thank in advance. Laurent