1TB External drive for Only $130?

I just bought an Acomdata PureDrive USB 2.0+esata.   Since the drive was so cheap, and since it supported eSata, I decided to get a esata card for my heretofore unused expresscard port on my macbook pro.  The combo works wonderfully!  I get over 400 mbits sustained reading and writing.  Not bad!

There is one trick.  The drive comes formatted with an MSDOS partition.  When I tried to format it to OS X extended, I got this error “File system formatter failed.”  Looking on the internet, I found this post which described a “multiple partition” method.  In truth, the only needed action is as follows:

  1. Go to Disk Utility
  2. Click on the external drive
  3. Click on Partition
  4. Pick “1″ under “volume scheme”
  5. Select “Options”
  6. The selected partition scheme is likely “Master Boot Record.”  You want GUID.  Select this and click “Apply”
  7. When the previous step finishes, go to “Erase” and select “Mac OS Extended (Journaled)” and click erase.
Magic!  Turns out this is a problem with really large disks.  So this could happen on Western Digital or other external drives.

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