One Figma page held 132 cards. Another held 164 names, and those already had the background and the object on top. The cards on the first page still had placeholder art, a blur, a gradient, and two text fields sitting on top.
The job was the same for every card: find the matching name, bring over the background and the object, hide the text, delete the blur and the gradient, and lay a 40% black fill on the background, above the image. The object stays bright. The background goes quieter.
By hand that is either a search through the other file, or a download of the assets for each name. I timed neither with a stopwatch. I wrote down the steps a person actually does, at a steady pace, once they already know both files.