Extracting 3TB Drive from Seagate Expansion External Drive

I have a 3TB external Expansion Drive from Seagate that I bought solely to extract the drive from to use in my desktop.  The case is held together by many plastic clips that you have to use a thin card or tool to pry apart.  I followed a guide like this one:
http://www.youtube.com/watch?v=ouaO946KnDA

After I took it out, I put it in my desktop and booted up.  Windows 7 showed 3 partitions:

1. ~300GB, RAW, mounted as drive E
2. ~1900GB unallocated
3. ~700GB unallocated

I deleted the raw partition, then right clicked on the  drive in the storage management view and selected 'Convert to GPT disk'.  This converted the disk to a single volume, which I formatted.

Now I'll run some more diagnostics on it, then start transferring data over.