Quote:
Originally Posted by raafayawan
Thank you for your reply. Yes I used this card on my phone before and at times had 72GB+ data on it so I'm pretty sure it is not 16GB. At first I transferred books through Calibre and after the same number of books (13000+) and 14.5 GB storage it started giving error communicating with device. This time I tried just copy pasting books directly to SD card and just around the same numbers it doesn't copy anything anymore.
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I would suggest testing the card. It might be failing and the error is when it tries to write to a bad sector. And I would still validate the size.
Otherwise, split the files up into subdirectories.