You can move files from 1st to 2nd. Just open these drives (double click on icons) and either cut and paste or copy and paste (safer), deleting 1st copy when you know second is safe. Better still back up moved files at the same time.
Xiaomi Mi Mix 2 review
What went wrong at the Designs of the Year 2017
iPhone X news: Release date, price, new features & specs
Comment regarder des séries et talk-shows américains en France ?