Samsung 256GB EVO+ MicroSD
It's a little overboard, but if you really need nearly 300GB of space on your Galaxy S7 or S7 Edge consider Samsung's 256GB microSD card.
Personally, the SanDisk 200GB Ultra is the best all-around deal, but if you absolutely need the full 256GB this is for you. It offers insane speeds of 90 MB/s in both read and writes, which isn't easy at this size.
Business users or those who want to bring an entire movie collection everywhere will want this 256GB microSD card for their Galaxy S7 smartphone.