17 R1, what is the maximum mSATA space?

I have Alienware 17 r1, and i already have 2 disks ( HDD with 1TB + SSD with 500 GB ) and these days i want to buy another disk for my mSATA drive slot, but i want to know the maximum space that my motherboard can work with it without any problems, and i also wish to know the best brands of mSATA because i can't find samsung or any other famous brands.

Regards