The bracket can be used for a hard drive or 2.5" SSD, or alternatively removed in some cases to fit a larger capacity battery.  
Months earlier i was installing an extra RAM for my laptop, and i noticed there was an empty slot  at the bottom right corner, i believe that is a slot for an extra hard drive, right? can i install a hard drive here? what are these tapes and blue foam? hope to get a reply.[IMAGE]what is this :(
What is this transparent thing? is it an empty hard drive slot?