Have a read of Enabling and Disabling C2 Auditing.
BeforeHowever before you do turn this off, hadn't you better check onas to why they are on in the first place? Do you have a business requirement for C2 Audit Traces to be turned on?
If you do have a requirement to keep them it looks like your best bet is to, you could write a script to move them every so often to a suitable secure location. TheyBy default they are written to the default data directory by defaultselected on install. You would haveIf this is a problem you may be able to change the location of the default data directory but will probably require bouncing the services for it to move where they are createdtake affect.
To change the default database file location, open SQL Server Management Studio and right click the Server object, select Properties and then Database Settings.