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Capacity in SDHC and SDXC cards

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Bobby Hall
Capacity in SDHC and SDXC cards
on Jul 10, 2013 at 10:53:04 pm

I did a test with my Canon T3i where I recorded 1 minute of footage on a 32gb SDHC card, and then 1 minute of footage on a 64gb SDXC card. Both files were roughly 360 mb. I read online that SDXC cards can hold significantly more footage than SDHC cards, which made me think that I would get way more footage from a 64gb SDXC card than two 32gb SDHC cards. If that's the case, why were the file sizes of the two clips almost identical?


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Sareesh Sudhakaran
Re: Capacity in SDHC and SDXC cards
on Jul 11, 2013 at 11:18:06 am

One minute of footage is one minute of footage. It has a fixed size, which, in your case, is 360 MB.

How many such clips can a 32 GB card hold? About 88.
How many such clips can a 64 GB card hold? About 177.

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Bobby Hall
Re: Capacity in SDHC and SDXC cards
on Jul 11, 2013 at 1:21:20 pm

Then why does a 64gb SDXC card hold 16 hours of full HD while a 32gb SDHC card doesn't hold anywhere close to half of that?


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