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Old 10-26-2018, 01:05 PM   #3
stumped
Wizard
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Device: kobo forma, Kobo Libra, Huawei media Tab, fire HD10, PW3 HDX8.9,
but if the OP is experiencing this with "every reader he buys"
( "everytime I've loaded my books on a new reader")
I would begin to suspect the cable or the USB port in use
so a new question is - have you tried with different cables and with different PC ports?

also there are 2 sides to an I/O error - the I and the O. could be the PC hard drive where calibre resides is becoming error probe and so is not reliably sending the data?
that could be tested by doing a "save to disc" operation, just to some other PC folder, or to a USB stick, with the same batch of books

Last edited by stumped; 10-26-2018 at 01:10 PM.
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