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I have the a6000 and have been using it for almost a year now, and I love it. This weekend, I have been going through old photos, and purging those images that I don't need. While toying around with lossless editing tools, I noticed that many of my images have an additional 500KB to 1MB of "junk" attached to the end of the JPEG image's data stream. I say "junk" because I have no idea what this data is. I imagine it is "metadata", but that much? Using some lossless editing tools, I have been able to safely strip this data off. My question to you is this: what is this "junk" data, and how do I prevent it from being written in the first place? This junk alone is wasting 10-20% of my disk space! For the record, I pull photos off of my camera by popping the SD card into my PC and pulling them off of it. I don't connect the camera to the PC. Refer to my attached image. There, I use "WinMerge" to compare the cleaned and original files.