I've just performed a factory data reset on my Z2 because of this problem. Don't get me wrong, I'm delighted with my HDR MV1 but Playmemories had crippled my smartphone. Why oh why did I bother with a 180Gb Micro SD card! It's only good for storing music, videos and photos captured by the phone itself. I couldn't send Adobe Acrobat Reader to SD either. So Google is to blame? I have to upload my music video, back it up to Google Photos, then delete it so as not to quickly clog up internal storage!
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