Balancing capacity, performance, size and reliability to meet the exacting requirements of ThinkPad customers, the ThinkPad 160GB 5400rpm Serial ATA Hard Drive can be used to upgrade the primary hard drive of supported ThinkPad notebooks. For additional storage and backup capability, use the optional ThinkPad Serial ATA Hard Drive Bay Adapter (40Y8725) to install this drive in the media bay of supported ThinkPad notebooks such as the ThinkPad T60 Series, the ThinkPad Advanced Dock, the ThinkPad X6 UltraBase and the ThinkPad X6 Tablet UltraBase.