I know that you can install ESXi 4.0 on a thumbdrive, but I was wondering if you could plug in an external harddrive to give extra storage to one of your VMs? We run a fileserver inside of ESXi that needs a space upgrade, but we're thinking of migrating to a different fileserver solution and would rather stick to external media to ease the later transition.

edit:

Ideally I'd like the drive to show up to the VM directly and not have ESXi control it, so that I could move it to a different machine and still have all of the data appear the same.