Dan bought a new 4TB external hard drive but his mac won't read it. It can see it, but Dan needs a workaround to get it working. Leo isn't a fan of giant drives because the larger they get, the less reliable they can be. But in this case, it doesn't sound like a bad drive, but a bad USB card in the enclosure. Leo suspects that the enclosure failed. So the trick will be to get an identical enclosure and card and see if it will read it. Leo also says that 4TB drive may actually be 2 TB drives in a RAID array. So look out for that. Dan says it's one drive, which is good news. But the encryption may be unlocked with the unlocker software that comes with the hard drive.