Supporting the industry's best response times for an 8TB nearline drive, Seagate's Enterprise Capacity 3.5 HDD enables the fastest data transfers thanks to our comprehensive advanced caching technology. Specifications Formatted Capacity 4 TB Form Factor 2.5 Interface Options SATA 6Gb/s Performance Spindle Speed (RPM) 7200 Cache (MB) 128 Transfer Rate, Max Ext (MB/s) 600 Sustained Data Rate OD 226 MB/s Average Latency (ms) 4.16