Up until fairly recently Calibre's Sony driver was sending thumbnails to all Sony models even if the thumbnails weren't useable on the older models. I don't know whether your reader can use them or not. The Sony driver was then upgraded to make sending thumbnails an option. It sounds as though you have now switched it off. However, you would still need to manually remove any thumbnails which had already been sent.
In addition to this, before calibre v0.7.44 there was a bug in the Sony device driver when using an SD card. Thumbnails were being sent to the wrong SD card directory for books loaded on the SD card.
The
correct directory structure for thumbnails on the SD card is
Code:
[SDdrive:]\Sony Reader\thumbnail\...
the
incorrect directory structure was:
Code:
[SDdrive:]\Sony Reader\database\thumbnail\...
So you would need to do the following to remove SD thumbnails:
- manually delete the incorrect SD card thumbnail directory structure.
- upgrade to calibre v0.7.44 or above to make sure the problem doesn't recur.
Does any of the above help?