Lenovo 40Y8725 Thinkpad Serial ATA Hard Drive Bay Adapter
Lenovo Serial ATA HDD Bay Adapter ThinkPad Serial ATA Hard Drive Bay Adapter.  The ThinkPad Serial Hard Drive Bay Adapter gives you maximum storage flexibility enabling you to add a second ThinkPad notebook Serial ATA hard disk drive into the Ultrabay media bay of systems supporting Serial ATA drives. With the second HDD in your Ultrabay, you have the fastest way to back-up key applications and critical data.