Hardd Photo by Adam Melanconrives are cheap nowadays, for sure, but what is suggested at the Microsoft newsgroups makes me sometimes want to go to Redmond and kick someones a**.
In a thread on whether the files and folders inside %windir%\$hf_mig$ can be deleted or not, the MVPs come up with the conclusion that a deletion would render a XP installation unable to perform further upgrades.
On my Win2k3 servers (~20) here at MUG each of those folders takes up roughly about 600MiB of diskspace (enough to fit a whole GNU/Debian installation by the way). While it would be easy to just add a new harddrive, it proves rather difficult to extend the filesystem without annoying downtime. Anyone saying "online-resizeable-filesystem"? Only available in Win2k8 or later.
So I'll continue to waste a total of 12GiB of diskspace and wait for the day the OS gets replaced by something sane.
End of daily rant!