Originally Posted by JSWolf
The default Calibre settings for sending an eBook to the device is to create a subdirectory and put the eBook there. If Calibre is not used to delete the eBook, will Calibre delete these empty subdirectories? If Calibre is used to delete an eBook, does that subdirectory and all associated file(s) get deleted?
No and yes. If you use calibre, it cleans up after itself nicely and will delete the directory if it is empty. That part is pretty device independent. If you use the device to do the delete, I don't think calibre will touch the folder. It definitely won't for the Kobo devices.