SanDisk 256GB A1 Class MicroSD Card
If you want to add tons of space to your Galaxy Note 9 without spending a ton of money, a 256GB card is a perfect middle ground. It's not too little, but not too much.
The company guarantees its A1 card will make phones open apps and games quicker. Delivering better performance throughout. "A1 can manage random read input-output access per second (IOPS) of 1,500 and write IOPS of 500, so it can quickly open apps and process accompanying tasks, such as audio, graphics, saved profiles, and in-app permissions." Basically, load times like opening apps and games are extremely fast. This isn't just press marketing talk, it really works.
This card usually runs over $100, but we often find it for under $85 on sale. That's a heck of a deal.