Angedacht was the memory card for something bigger photos / films from your smartphone (20MP / 4K). The supplied card reader is noticeably warm when using the PC, but should not interfere. Observations: PC via USB 3 with the CT-Tool "H2testw": Read 57 MB / s, Write 39 MB / s At Galaxy TabPro8.4 (internal card slot) with "A1 SD Bench": Read 56MB / s, write 20MB / s
Conclusion: Not very exaggerated for the desired purpose, but in the praise in terms of values.