Summary: Do some looking around; there were 4000+ reviews for this item last month; the seller has changed the listing so all those reviews no longer show up.. Just as well; nobody can read 4000 reviews. BUT, keep in mind other sellers offer this drive with a full warranty and Oceanside does not.
Summary: I purchased this drive because I though it was a good deal. Buyer beware, Tiger Direct didn't advertise the spindle speed. I was quite dismayed when I got it to see that it was only 5900 RPM. I bought it to upgrade my Late 27'' iMac. I thought why not, 4TB would be good in there.
Summary: I could not use the full capacity. My system could only use a little more than one half its capacity. When I returned it I was charged shipping again after I paid full return shipping.If the product has limited capacity do to OS then it should be stated on the web page.
Summary: At about six months old the drive started making a quiet clicking and buzzing noise. Sounds bad I thought. I immediately purchased an external USB hard drive to back up my data. Unfortunately, the drive failed completely before I could back-up my data. Useless, I'm never buying Seagate again.
Excerpt: I've ordered 9 of the 4TB seagates in total. One dead on arrival (failed to even spin up), and one had bad sectors / ecc errors - picked up immediately by my raid controller as part of raid build process. Both were returned for exchange (thanks Scan).