SanDisk's 200GB Micro SD Card is available for just $54.75 right now, that's a great price for this micro SD card, considering it is normally priced at $84.99, and also brings it down to a new all-time low. The previous low on the micro SD card was $59.99.
This micro SD Card is part of SanDisk's Ultra lineup, which provides faster read and write speeds, as well as being A1 rated for running apps and games. With this card, you're going to get 100MB/s on both read and write speeds, which is going to be more than fast enough to write 4K footage onto the micro SD card in real-time, instead of needing to wait for the footage to write to your micro SD card before being able to record more footage with your phone's camera. And where most smartphones are capable of shooting in 4K, it's definitely a good thing here. This is also rated A1, for running apps and games on your micro SD card instead of the internal storage on your phone. Which means you aren't going to have apps running slower that are stored on the micro SD card, which is important, as it could cause the phone to feel like it's lagging. But that's not a problem here with the SanDisk Ultra.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap (usually $3.99) next-day shipping if you need it extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime. You'll get 30 days free (if you're a student, you get 6 months), and then it's $119/year (or $59/year for students). Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.