Connect the USB drive to the other device where you want to restore them, open the same Sticky Notes folder, then copy and paste the plum.sqlite file into the same folder. Click Replace the file in the destination when prompted. Close the folder, restart your computer just to confirm changes then launch Sticky Notes on the other device. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.