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Try HP Disk Format Utility, This little tool may solve your problem. I've used it many times and it successfully format my corrupt and protected memory cards. http://h30499.www3.hp.com/hpeb/attachments/hpeb/bsc-271/94269/1/SP27608.zip


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If classes are the same, then my first assumption would be fragmentation issue. SD cards are typically formatted with FAT file system which suffers from fragmentation if the card is used intensively over a period of time. If this is true and fragmentation is the problem, then you need to defragment the card. However do not use any defragmentation software. ...


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Your SD card is probably in read-only mode, just try to mode the side "switch" to read/write mode. This will probably fix it, if not save your current files in your computer an run an sd formatter. If the problem still persists, run a "Check Disk" on the SD card. This will solve your problem, if you do all these and you can't still move files into the SD, ...


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Did you see any Physical damage on the reader? If so, it's broken, and I doubt the manufacturer will fix it. Just in case though, call the manufacturer of the SD Card reader. They should be able to help you.


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There's a Linux utility called testdisk that you might try. Additional info: If you want to try this on Debian the disk devices can be listed with ls /dev/sd* (or sometimes /hd*).


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The speed class rating is the SD Association standard. These number are the ones you see that range from 1 to 10 and will be inside of a U or a C. They represent the card's minimum performance. The "x" rating is a commercial rating. Manufacturers will give this number and it is the maximum potential of the card. Lexar has a white paper on the whole ...


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The allocation unit size will make very little if any noticeable performance difference here. Too large of a size can lead to inefficient usage of storage space if you have many small files. Stick with the default and let the SD card controller handle block management and buffering -- that's what it's there for anyways. The way to get the best performance ...


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Those errors are not disk errors, they're USB errors. The disk is probably fine, it's a problem with (in order of likelihood) the USB cable, the USB connectors, the USB root port/hub, a broken USB device controller or a dodgy host controller. Try a different cable in a different USB port and see if it makes a difference. Insert the plug quickly and firmly, ...



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