The Dell Latitude 12-5250 Laptop Supports Single Drive Configuration Only. (One 2.5" Solid State Drive or Hard Drive or One mSATA Solid State Drive) Note: When a mSATA Drive is installed, the mSATA Drive occupies the 2.5" Drive bay. If replacing the mSATA Drive for a 2.5" Drive, you will need the 2.5" Drive caddy p/n GY92H and cable p/n HGJHP for installation. If replacing the 2.5" Drive for a mSATA Drive, you will need the mSATA adapter caddy p/n 35DXP and connector board p/n 8JFFG for installation.