[delphin]

What software version of Calibre do you have?

I ask because these "plugin" options changed from release to release in Calibre.

Don't get too hung up on the exact name, just open up your preferences and find the 'plugin' section, and do your best to find the Sony Device plugins.

Can you see ANY of the 'plugin' settings under preferences?

If you can find the plugin preferences, but can't see the one for the Sony, be aware that on at least one version of Calibre, I couldn't easily find ANY of the Sony plugins, because the of a silly/stupid thing where the plugin preferences window was defaulted just a little too small. So it wasn't wide enough, and the right side scroll bar wasn't visible. Because of this, you couldn't scroll down and find the "Sony" plugins in the list until you intentionally grabbed the right side of the window and dragged it to resize it larger.

When you find the right plugin you should be able to hit the "customize plugin" button and then, if it's the right one, down near the bottom of the pop up window, will be an option that controls turning "metadata fields into collections on the device" In older versions of Calibre it was just a yes or no check box, on newer versions it's a single line text box.

On the older versions of Calibre with the check box, you just un-check it, and on the new versions with the single line text box, if you blank it out and don't list any tag fields, then it will also disable the creation of collections completely.