I know most Hard drives do this, but in the past I feel it was closer to 256 GB. My 128 shows that it has practically 128GB available. My 256 on the other hand shows closer to 238, where I'm sure it showed more before....unless I'm crazy I was pretty sure it was close or under 256 by the slightest. This has been formatted in camera and everything. It's the oddest thing. Any advice? Or is this how much memory is actually present on most for others?