Does anyone one know the spec's on the hard drive that Seagate puts in this model? This is the regular model, not the PRO. Seagate part # ST307504FDA1E1-RK. I tried Seagate's site, but I did not find what I was looking for. OfficeMax has them for $128.00 + free shipping which seems like a really good deal. I'm interested is the cache size and the interface type of this drive as I'm thinking of removing the drive from the case to put in my mac pro and then put a smaller drive in the external case. Thank you!