So I am new to the smart controllers. I put a 400gb sd card in my new rc pro and flew my A2S for the first time today and had 5 clips recorded. I went into the album and downloaded the first 3 and went to dl the other 2 it said insufficient space and to delete some files to free up space. What space are they referring to and how do I free up some space and delete things and from where? And how do I get it to write to my 400gb card in the controller?