“How many bays does the laptop have? Can both an SSD and a HDD be installed? Looking to install both an SSD and a HHD. Does the laptop have two bays for the drives? Are they accessible w/o removing the keyboard? Is/are the drive(s) interfaces SATA III 6.0Gb/s -600MB/s? Or instead, would the CD/DVD - optical drive have to be removed and replaced with the 2nd drive? Thank you!”