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Originally Posted by Iskariot
My SD card is formatted properly. I read the Kobo manual  . |
Some people have found that they had to use a different formatter to get the cards working. But, when that happened, it was the device that wasn't seeing the card.
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I never had problems copying to the main memory. But I also never copied batches quite this large. However I do not feel it is the size of the batch that is actually the problem, but the fact that the device is connected for a much longer time, which increases the chance of the problem occurring.
I do not feel it is the SD card that is the problem. When problems occur the main device and the SD card both show up in windows as "no disk inserted" or something like that. Very often the systems seems to try to 'reconnect' as windows slows down somewhat if I open My computer to see what is going on.
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The problem is working out if a particular action causes the disconnection. Copying a lot of files might as it could overwhelm the hardware or drivers and cause problems. Or it might happen when calibre is making changes to the database. That means changes to a large file.
A test you could do is to copy the files to the SD card without calibre. If that fails, then it is an issue with how the PC talks to the device or the card. Which is at fault, I don't know. If it doesn't fail, then it might be something the calibre driver is doing.