Hi!
Really large files Virtual DVD's etc) I store on a separate volume that I have mounted in the C: NTFS tree. Did this with Disk Manager. After a reboot this volume appears in Device Manager under Portable Devices which is wrong of course. But after reboot with a yellow triangle (code 10). It is working fine though. Annoying.
I suppose this is a problem in the boot sequence of Windows 8. Could a technician at Microsoft look into this and repair this in a future version.