SEAGATE ST3400620NS SEAGATE GENERIC ORIGINAL HARD DRIVE ST3400620NS - SEAGATE - BARRACUDA 400GB 7200RPM SERIAL ATA (SATA-II) 3 ... Please ensure that your original part number matches this exactly, or check with the manufactuer for compatiblity. Customers are responsible for compatiblity. This part is guaranteed to be fully functional, original and authentic. ST3400620NS - SEAGATE - BARRACUDA 400GB 7200RPM SERIAL ATA (SATA-II) 3 ...