I didn't hear on what the internal storage situation is? I presume that 2.5" drives are fine since most pro's will use SSD, or high performance platter 2.5". But it doesn't actually say. Also, if there are internal 2.5" slots, are they user accessible? If I wanted to do a SSD RAID0 internally, can I? I don't have enough need to get an external TB2 enclosure. Was this mentioned at all??