Compared to the Switch, 128 GB of storage is a huge increase, likely more than most users would ever need. However, 128 GB of storage may be beneficial if you intend to download many games and other entertainment or if you want to store many media files on the Switch. Assuming you run out of space, you will need to delete games or other stuff to make place for new games because the Switch's internal storage cannot be expanded. Additionally, you may increase the Switch's storage space with a microSD card, enabling you to put additional games and other files on the gadget. Whether 128 GB of storage is plenty for a Switch will depend on your requirements and how you want to use the device.