THE FEATURES OF THIS PRODUCT ARE VERY WELL BUT FOR THE APPLICATION "ZSUN" ON SMARTPHONE CAUTION: THERE BUGS 2: 1 LOT OF WORK FILE BUT IF YOU WANT TO MOVE FORWARD OR BACK POUVOIS VIDEOS IN THERE THAT THE EXTENSION "MP4" WHO IS VALID. 2 UPON CHANGE IN FILES ON THE MICROSD CARD MACHINE, THE SMARTPHONE AGAIN OLD CONTENTS. A TO OFFSET THAT: BEFORE STARTING ON ZSUN SMARTPHONE: "PARAMETERS" THEN "APPLICATIONS" THEN "ZSUN" THEN "DATA CLEAR" THEN "OK" I HOPE THAT THESE DETAILS WILL HELP YOU.