Originally Posted by Quelch
I have all our eBooks in Calibre but I only plug one reader in at a time
It may confuse Calibre to have two readers plugged in at once, it would certainly confuse me !
Calibre cannot recognise more than one reading device on the USB at a time. If you plug in two at the same time then only the first one seen by the system will be recognised by Calibre. Unplugging the first one is required for the second one to then be recognised.