hi

which memory card is perfect work for mavic air ?

For Mavic Air, Class 10 or UHS-1 rating SD Card is required, here is the recommended list for your reference:
16G
Sandisk Extreme
Kingston 16GB SDHC-I SDCAC/16GB
32G
Sandisk Extreme V30
Sandisk Extreme V30 A1
Sandisk Extreme V30 Pro A1
64G
Sandisk Extreme V30 A1
Sandisk Extreme Pro V30 A1
128G
Sandisk Extreme V30 A1
Sandisk Extreme Plus V30 A1