Top positive review
Upgrade for My Nintendo Switch
Reviewed in the United States on September 7, 2018
I bought this to replace a 128GB SanDisk card that I'd filled up in my Switch. I was able to copy everything over from the old 128 to this new 256 (just copy the entire Nintendo folder from the old card), and my Switch found it and ran my downloaded games and updates without a problem. And much, much faster...
STEPS TO "UPGRADE" WITHOUT RE-DOWNLOADING YOUR GAMES/UPDATES (NOTE: Requires a computer with enough available storage to temporarily store the files and a SD/microSD Card reader):
1. Power off the Switch. - Hold the power button for a few seconds until the power menu pops up. Touch "Power Options" and "Turn Off." Do this every time you insert/remove the microSD card to avoid data corruption.
2. Remove the old/smaller microSD card.
3. Insert the new/bigger microSD card. Power on the Switch (You may see a popup dialogue telling you that a system update and a reboot is required. If so, update, reboot, and continue). Check "System Settings" | "Data Management" to ensure that the new microSD card is visible to the system.
4. Power off the Switch, and remove the new/bigger microSD card.
5. Insert the old/smaller microSD card into your computer, and copy the entire Nintendo folder from the card to a temporary location, e.g., the Desktop.
6. Eject the old/smaller microSD card via the OS (Do this every time to avoid data corruption), remove it, and insert the new/bigger microSD card into the computer.
7. Copy the entire Nintendo folder (the one you just copied from the old card to the computer) from the temporary location on your computer to the new/bigger microSD card.
8. IMPORTANT!!! If you are doing this on Windows, you will be asked by File Explorer if you want to keep or overwrite three existing files (8000000000000000, 8000000000000124, and private) on the new/bigger microSD card. You MUST OVERWRITE THESE FILES WITH THE BACKED UP FILES FOR THIS PROCESS TO WORK! If you do not, the card will have all the data on it but the Switch will not see it.
If you make a mistake and do not copy over the existing files, no worries. I did the same thing. You can fix it by copying "8000000000000000" and "8000000000000124" from "Nintendo\save" in the backup to "Nintendo\save" on the new/bigger microSD card (or just copy the entire "Save" directory) and "private" from "Nintendo\Contents" in the backup to "Nintendo\Contents" on the new/bigger microSD card.
9. Eject the new/bigger microSD card via the OS, remove it, insert it into your Switch, and power it on.
DONE! Every game download will be visible and playable on the new/bigger microSD card in the Switch.
OPTIONAL: Delete the "Nintendo" folder from your computer. I'd recommend hanging on to it and even occasionally updating it to avoid having to spend hours re-downloading your games should your card ever fail in the future (But it won't because, hey, this is a Samsung!).