Right now I'm using a 4Gb Touro drive that I have formatted as a hybrid drive with both my Mac and my PC. However I have all kinds of problems with it. Specifically my Mac (OSX 12.6) often doesn't "see" it. I'm worried that at some point I the near future it won't be recognised at all so want to move all my files to a different drive. Can anyone recommend a good reliable external drive?