The IBM Lenovo ThinkPad T4xx laptops are compact laptops featured with a 14″ LCD screen. The case is built with carbon fiber material which makes it sturdy and great for traveling and in professional use (e.g. engineering industry). The laptops can be equipped with a very fast Core i5 or Core i7 processor with the QM67 chipset. Therefore these laptops are great for upgrading with a SSD because the chipset allows high SATA speeds which only a SSD can fully utilized. These laptops can also be configured with a SSD. The graphics card is a standard GMA 3000, thus gaming performance is limited. However the ThinkPad series were never meant as gaming laptops.
To add a second hard drive to the IBM Lenovo ThinkPad T400 T400s T410 T410s T410si T410i T420s T420si T430s T430si laptops you can use a HDD Caddy. The HDD Caddy replaces the optical drive in order to add a second hard drive to the laptop.
For the IBM Lenovo ThinkPad T400 T400s T410 T410s T410si T410i T420s T420si T430s T430si laptop
You will need this HDD Caddy