The ThinkPad Serial ATA Hard Drive Bay Adapter III lets you add a second drive, hard disk drive or solid state drive, to the ThinkPad Ultrabay. With a second drive, you can store more data, and also back-up critical data.
The ThinkPad Serial ATA Hard Drive Bay Adapter III is supported in the following ThinkPad systems: R400, R500, T400, T400s, T410, T410s, T500, T510, W500, W510, W700, and W701. Using the optional ThinkPad X200 Ultrabase (43R8781), the ThinkPad Serial ATA Hard Drive Bay Adapter III is also supported with the following ThinkPad systems: X200, X200s, X200 Tablet, X201, X201s, and X201 Tablet.