I agree, 60GB is nothing considering that I was capturing HD.
But, the problem is not the temp files that may be created, but that the hard drive seems to have lost a corresponding amount of its capacity. Whereas before, My Computer indicated a capacity of 130 GB with xxx free, it now gives a capacity of 70GB with yyy free. The lost 60GB must be hidden/system files because they don’t show up when searching with Windows Explorer.
It is a Manfrotto 701hdv. The problem is that the slide plate totally blocks the battery release clip, and does not allow the battery to be removed.
I took a photo – it is not very good but shows the problem.