SanDisk's 128GB micro SD card is currently on sale for just $44.90, which is a pretty great price, nearly 50% off of its regular price. This is not the lowest price we've seen for this model, but it is within a couple of bucks, so it's still a great time to pick one up.
This is the SanDisk Ultra 128GB micro SD card, it's "Ultra" because it has transfer speeds of up to 80MB/s, which is definitely fast enough for filming in 4K, especially on a smartphone like the new Galaxy S8 and Galaxy S8 Plus, both of which have a micro SD card slot available for expanding your storage capacity. This micro SD card is great for both smartphones and cameras, as it does come with a standard SD card adapter, it will also work in your DSLR camera. On your smartphone, you'll be able to store your pictures, videos, music and even apps onto this micro SD card, giving you more room on your smartphone without having to buy a new one.
It's also eligible for Amazon Prime's free shipping. If you are not a member of Amazon Prime, you can sign up for a free 30-day trial and take advantage of unlimited two-day shipping as well as the many other perks that Amazon Prime includes.