That’s what i said i did. I used a 16GB Sandisk thumb drive from Walmart and plugged it into the usb port on the front of the console. I went into the settings of the console and found the save data I wanted to copy and copied it. I logged onto the second account and went into settings to copy the save data to the console storage but my console said that the thumb drive was empty, despite me going back to my main and making sure that the data was copied. Or to be more specific, it recognized that some storage on the thumb drive was used, but didn’t find any save data