Bridge's tmp files on every disk?

Hi,

how can I prevent Brdige from writing douzens of tmp files on every disk?

If I connect my Backup-USB-HDD, Bridge writes about 20 tmp files directly on it.

I don't want this. I want Bridge to store its tmp files if it needs them on one definded location (and this should never be the root of any disk).

What registry entry do I have to set? What options to switch?

Thanks

Konrad