Hello, I am thinkin about getting a 2015 rMBP 13" i5/8GB/128GB. I would like to know if you all can offer me advice or suggestions about extra storage. Can I use the SD card slot for "temporary" storage? I want to keep something like a 256GB card in there at all times to store stuff I don't want to store on the SSD. I figured what I would be using the device for I could go this route. I will be mostly streaming movies, TV shows (although some will be played on the device itself) and games from my main rig via Steam In-Home Streaming and PS4 Remote Play. I will occasionally run Photoshop, Illustrator and Dreamweaver when I am away from my main rig. On a side note, how is the battery life for this type of usage. I actually trying t compare it to a Surface Pro 3 i7/8GB/256GB. Thank you in advance for all responses.