I'm testing just as part of a product test, the Samsung Evo Micro SD 32GB card. The card runs really well, I'm really excited! That which has the 5-way protection is clear (waterproof, heat & cold-resistant, magnetic safe, shock and impact resistant, and X-ray quality). Lately different Samsung the various series in standard (blue), Evo (orange) and per (gray). And I think the Evo and Pro are most suitable for our S4, because they are much faster (Class 10 with up to 48 MB / s read and Class 10 with even up to (max.) 90 MB / s (UHS- I) (80 MB / s in 64GB). Since it is from the same manufacturer as the mobile phone, I hope to continue a high level of compatibility.