Nokia :: N5800 How Long Does Backup Take?

I started a backup of my N5800 over an hour ago. It finished "user files from phone memory", contacts, calendar, notes, messages, bookmarks in about 10 minutes. Then it started on "phone model-specific backup" (at 50% of the big progress bar). And hasn't progressed a pixel since then.I got fed up with watching "do not use or disconnect the phone during the operating", so I clicked "cancel". Then it asks me if I really want to cancel. I can then click the checkmark (green) and not hte red cross, and now 5 minutes later, it has not stopped. It is still at 50%, doing "phone model-specific backup". How long should I wait for it to backup my N5800? How long should I wait for the "cancel backup" button to react? 5 minutes seems that it should be possible for an operation to cancel. I'm a bit unfamilar with Windows. I'm a Linux user, so I may be a bit spoiled in that I expect a progress bar to update more than once an hour, or that a cancel button should work within 5 minutes.