Review on Seagate Constellation.2 500GB 7200RPM SATA 6 Gb/s 64MB Cache 2.5-Inch Internal Bare Drive ST9500620NS - High-Performance Data Storage Solution by Mahmut Ojeda

I believe this is a 15mm disc while most are 9mm or smaller. You will find it difficult to install this drive on any device (laptop, hard drive enclosure and even small form factor PC). The cost of the hard drive was cheap, so I thought it was a good investment. Since it definitely didn't fit, I already had it, so I bought it specifically for this drive. When the new case finally arrived, I installed the drive and found that it didn't even work. I sent it back for a refund and bought a thin 7mm disc that worked on all my hardware. What a disappointment.