Newb here. Following the HA installation instructions i’m using the haos_generic-aarch64-16.3.vmdk file which under VirtualBox shows its 6GB of storage. For the life of me i cannot see how to expand that. It appears to be tied to that installation file.
The reason i want to expand is i can’t install any add-ons because its says i have insufficient space.
You need to set it under the Virtualbox configuration somewhere.
It is not tied to the image file.
Once it is set, and you should set it to at least 32Gb, then restart the HA server (not just the HA core).
HAOS will then auto-expand on next startup and that might means it takes a bit longer to start up that one time.
This was answered better in another thread: