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The Seagate ST3120215ACE is a 3.5in. desktop drive optimized specifically for DVR applications with Seagate's DynaPlay technology. Its 120GB capacity allows you to record all of your favorites TV shows while the 7200RPM, 2MB cache and IDE Ultra ATA100 / ATA-6 interface guarantee speedy data transfer. Proven Seagate quality and reliability round out the reason why you should choose this hard drive.