If you send it by a secure courier service or even certain types of post I would think that liability no longer rests with you. If damaging information leaks yo

If you send it by a secure courier service or even certain types of post I would think that liability no longer rests with you. If damaging information leaks you could then likely sue the carrier and/or Seagate. A likely solution would be to use a vendor that can appropriately wipe the device before sending it to the manufacturer for warranty. There's really nothing else a hardware manufacturer can do on their end. If you're dealing with information that sensitive, some sort of degauss, replace, and recycle is just part of operating cost.