Ah right. DNG support isn't built in the way JPG and other common formats are.
There's two choices:
Open them with an image viewer which knows what to do with DNGs. Adobe Lightroom, Photoshop or Camera Raw will do this, or if you want free, IrfanView will display them too :-)
Enable Windows to understand them itself. This way lets you see the thumbnail previews, but be warned that due to the large filesizes and sheer amount of data in the image, it's slow. Install the Adboe DNG Codec to enable it, from the Adobe website here. It says Windows 7 but I've installed on Windows 8.1 and it does work.
Personally, if you're just wanting to view them, I'd go with option 1 and IrfanView :-)
I know it's not quite what you asked for, but Best buy was selling a pioneer radio with a usb port and bluetooth capabilities, as well as 2 6.5 speakers, for 100-120 dollars. It's what I use, I'll try to find it.
edit: kind of looks like this one,
but mine has cell phone capabilities as well, however I can't seem to find it.
I think GeoSetter should do what you need - I've used it to rename batches of photos based on Date/Time taken and Latitude/Longitude. It can also show the photo locations on a map, which might be handy.
The 32GB version of this Samsung card has a 80MB/s write speed. The 64GB version only has a 50MB/s write speed but that's still quite fast. They both have a 90MB/s read speed.
I got this one recently. Solid case, I like it a lot. Great price too. The screen protector and stylus that come with it are crap, as to be expected.
I have this one lying around since I recently just bought a different one.
I personally didn't like it because of the thickness it gave but it did feel as if it were protected enough for drops. I have no use for it anymore.