I have a Lacie external hd enclosure. The .5 TB drive started making noise so I got a Samsung 250gb drive to put in it. Now, after backing up with Time Machine, the activity indicator light eventually always flashes solid bright by the end of the day meaning the drive is churning at full speed. I then have to repair it due to the same error "Too many access control lists" ( I think that's the error). I repair the drive, plug it back in and it works until the next day or that evening when I notice the drive churning for no reason. I've researched the error but get only references, no causes. Any ideas what the problem is?