After having lost all my data on my mac there 2 years, thanks to a hard drive that made the soul, I turned to USB keys, I bought 3 of these keys at the same time (2 of 32GB and 16GB); I am very very happy I was able to copy my 6000 photos and videos on my key 16 and all my audio work and documents on my keys 32. I recommend a 64GB today they are reliable and function very well. That's all we ask for a key and I have not found insurmountable slowness.