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The card has probably developed an error. Flash cards (including SD cards) have a limited number of writes, and, while the expected number is large, sometimes failures happen early. Or it could simply be a manufacturing defect. In either of these cases, Sandisk — which has awesome long warranty periods ­— will probably replace the card, but that doesn't do ...


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There shouldn't be an issue (the camera shouldn't be able to discern between a regular SD card and a micro SD in an adapter), just be aware that the camera might want you to format the card (and even if it doesn't, it's a good practice to do so), hence you will lose any data you may have on the card. You might need to format it again when you put it back in ...


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According to Nikon's support page, Approved SD cards for D40, 4 GB is the highest-capacity supported SDHC cards. And note, "Other brands and capacities of cards may work, but Nikon cannot guarantee their operation."


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From the card's perspective, there really isn't any difference between what the camera does while formatting and when it's writing pictures. It's all just data written to blocks on the device* and you're not doing it any harm. The format done by a camera does a couple of small writes: a fresh partition table and new file system headers. Both of these make ...


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SDHC and SDXC are descriptions of the card formats (Secure Digital High Capacity and eXtended Capacity). SDHC only supports cards of less than 32GB, while SDXC supports cards with more than 32GB. If your camera does not support SDXC, nothing you do to the card will make it work properly. The camera might see the 128GB card as a 32GB card, but the odds of ...


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From Lexar Website: "SDXC is an SD memory card format that is based on the SDA 3.0 specification. SD and SDHC cards are based on the SDA 2.0 specification. SDXC memory cards use the newer “exFAT” file system that is more efficient for SDXC’s large capacities, while SD and SDHC memory cards use the FAT32 file system. This difference is the reason that the ...


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It is possible that the card does not have a partition table. I have encountered a few problematic cards that were formatted this way. In these cases, the card was formatted with a file system, but no underlying partition structure.  Such cards would still be readable by your camera, and you can try transferring files through your camera. However, this is ...


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Can this harm the SD card or is it ok? It's more than OK. It can actually be beneficial. You're much more likely to extend the life of the card, as compared to never formatting and only erasing images in the card, by formatting regularly. The way flash memory cards (and USB flash drives) work is that the memory controller on the card assigns different ...


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Just a side note: slowness during making night shots may be due to noise reduction... The data transfer speed is easy to calculate. Take a picture of your choice (e.g. RAW with 12-bit, uncompressed - just an example), and see the file size of that. (Or average the sizes of the pictures you have made - or find the worst case size.) Now, when you make ...


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Benchmark the card read/write speeds on your (or someone else's) computer. Class 10 should read & write at speeds of at least 10 MB/sec. For stable recording at 1080p@30fps, you probably need about 6 MB/sec minimum write speed. If the card isn't performing at its specified rate, then this could be your problem. You could use something like hdtune on ...


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I've come across that. It's because the card reader you're using doesn't support SDHC and nothing to do with Windows 8 at all. Don't format the card on the PC as you'll create a 2gb partition and then that's all your camera will format. Get yourself a decent reader and the problem will disappear.


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The Raspberry Pi has a lot of weirdness happening when it comes to SD cards. What will have happened is not a broken card - although it would be reasonable to expect people who've not had the experience to assume that it is. Actually the problem is that Linux on the Pi has knackered the 'partition table'. That is not overwritten by either the in-camera ...


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