SATA 2nd Hard Disk Drive HDD Caddy Adapter for ThinkPad T400 T410 T420s T500 W500 W700 ThinkPad X200 UltraBase Plug & Play, Supports hot swapping. Fast & Reliable connection in ThinkPad, just as the primary HDD. Fully integrated into ThinkPad laptop, no cables/PSU/software driver needed . Compatible : ThinkPad T400/T410/T500, T420s,W500/W700 and ThinkPad X200 UltraBase. This device accept 2.5"/9.5mm SATA HDD(works great with a SSD hard)