questionschallenge: 16 or 32 gb micro sd card.

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Do you really need a Class 10 for a Nook Color? I think you could save a lot of money being willing to go a little slower. Unless you're constantly uploading/downloading huge files onto the card Class 10 is a bit excessive.

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@novastarj: Maybe not. Not my specialty. What class could I get away with for movies, music, etc.? This is why I post here. I learn things. And thank you for pointing that out.

Additional question: If I root it to be basically an android tablet and I need that space for multiple programs should I have a class ten? Nook Color internal HD is only 5 GB.

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How critical is the Class 10 to you?
I ask because I've seen several people claim (with speed tests backing them) that because nobody verifies read/write speeds manufacturers can claim it's whatever Class they want. This means that a Class 6 from someone like SanDisk will be much better than a Class 10 from Transcend.

I found 16Gb for $30:
http://www.amazon.com/Patriot-Signature-MicroSDHC-Memory-PSF16GMCSDHC10/dp/B004H8FTCU/ref=sr_1_9?ie=UTF8&qid=1311196996&sr=8-9
and this one's a bit better of a bet, with 32Gb for $70
http://www.amazon.com/PNY-Hi-Speed-MicroSDHC-Tablet-P-SDU32G10TEFM1/dp/B0052W534E/ref=sr_1_8?s=electronics&ie=UTF8&qid=1311197340&sr=1-8

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@trahentis: @novastarj also asked this question of the class 10. You posted a minute after my reply, so please see that and offer any suggestions. Thanks.

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@mfladd: I don't have enough experience with Nooks or Android to tell you what read/write speeds you should be looking for. Mine was just a warning that brand is almost as important as the Class of card you get.
In short, beware of low quality. Because you definitely needed someone to tell you that.
Sorry I couldn't be more useful.

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The general consensus seems to be that you can't go wrong with SanDisk. It also gives some benchmarks, and some older deals.
http://forum.xda-developers.com/showthread.php?t=958319

Those are primarily for lower capacity cards, however SanDisk seems consistently better than the competitors, even when the SanDisk is rated at a lower class.

My personal guess? SanDisk may be doing what CPU / GPU vendors have done - sell a higher-quality part as a lower quality one so you don't have to make two different parts. Or even use the almost-perfect Class 10 cards as Class 6 if their speeds aren't consistently high.

On July 25th, Costco has an online deal on a PNY 16GB Class 10. It was currently $30, the flier said up to $8.00 off in the PNY section (so hopefully it is more than $1.00 off?) so I'm taking my chances with that.

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Thanks for the reply and thread (informative for NC). Unfortunately, Costco deal was done, and not a member anyway. Only Sam's in this neck of the woods.

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@mfladd: Costco deal may have been an old one, but the new one starts on the 25th! (I triple-checked, have a bad habit of picking up items in-store BEFORE the associated coupons start...) If you have any friends and family in other parts of the country with a Costco, you could always ask them to buy it for you and pay them back.

Sam's tends to have pretty similar deals to Costco. I don't know if they send out fliers (don't think they used to) but that would be what to watch for.

I just bothered to check what I have in my NC - 8GB Class 6 Lexar. That was plenty for CyanogenMod to run at a comfortable speed. The link I posted above mentioned another Lexar card. If you can find a good deal on either a Lexar or SanDisk Class 6 or better, that would be my recommendation.

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OP, I dunno if you bought a card yet, but this deal is good through 8/29. I was looking for a large and fast card for a NookColor, too. Large video transfers can take quite a while on slower cards, so I went with the Class 10.

ADATA 16GB Class 10 for $25 shipped, use promo code MEMFS for free shipping.

http://www.supermediastore.com/product/u/a-data-16gb-microsdhc-class-10-turbo-flash-memory-card-with-sd-adapter?search=microsdhc&hiddenSearch=+%23brand%3A%27ADATA%27+%23Capacity%3A%2716GB%27&max=15&offset=0

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@novastarj: Actually, a NC will show issues with anything faster than a Class 6 card; especially trying to run something like Cyanogen from it. Supposition is that the card reader firmware may be unable to keep up with overly-fast responses and 'drops' data.