In place of a SanDisk Ultra microSD 64G. Speed ​​at RDV. Positive impact on the performance of the phone (Galaxy Note 4)

I used the SanDisk Ultra 64GB microSD since 2012 in different phones or tablets and cameras.
Satisfied with these cards and after-sales service SanDisk (I had a problem with one of the cards) I decided to fight the "lag" from my Galaxy Note 4 when accessing the external card by investing in a faster card.
Large file copies of measures between the card and PC performance really shows with go:
- 52 to 55 MB / s write
- Of the order of 72 to 75MB / s read.
(FYI: PC Windows7 CPU: i7 with 16GB of memory, copies to / from disk SSD 840pro, USB3 external microSD card reader)
On the phone, the access times are better, especially when handling the "gallery" access to photos and videos.
Note that I have many pictures on it (almost 3000)

Overall I am very satisfied with this card that delivers expected performance levels.