Calibre leaves a file about what it finds on the device, to speed up the search the next time. (aborting a Tablet scan and this never generates, so the scan retries the next connect)
Using your OS file manager, look at your device: the file is metadata.calibre.
How big (bytes) is that?
Driveinfo is used to link calibre to specific PC installations (for those of us that use more than 1 PC ). Avoid removing that
|