If you were using a high-performance camera (D7100) and shooting RAW and shooting sports with continuous long bursts then 20MB/sec would not be enough.
Charles
Nikon D800, D7200, Sony RX100m3
Not buying any more gear this year. I hope
Re: Is this an acceptable memory card for my nikon D 3200?
The D3200 takes 3 types of memory cards: SD – Up to 2GB worth of images and video; SDHC – Up to 32GB worth of images and video; SDXC – Up to 128GB (currently) worth of images and video.