Mcsher SATA 2nd Hard Drive HDD Caddy For HP ProBook 4510s 4520s 4530s 4525s 4540s 4545s 4720s 4730s 100% brand new and high quality, Unused in perfect condition. Plug & Play, It work with SATA Hard drive and SSD (Solid State Drive) as well. Fast & Reliable connection, just as the primary HDD. Fully integrated into laptop, no cables/PSU/software driver needed. Dual boot, Support installation of 2nd operating system on the 2nd HDD and boot selection.