Are you seeing "Index Full" only on the 64 GB cards - not on the stock card? It could be in the way the aircraft handles FAT & exFAT formats or may be isolated to the brand & model of the 64 GB cards you have been using. There's too many uncontrolled variables to determine the root cause.
I couldn't tell you what card(s) it happened on, it's so long ago now. All I know is that I always format the cards in the bird, from the Go app, so the FAT handling seems to me to be in DJIs court in that respect.
The file cut-and-paste happens in the card-reader attached to the Win7 machine, so that's in charge of that. Given that the same is true for all removable media I use in my various devices and the DJI device is the only one to throw an "Index Full" error (or any type of 'unable to write to card' message), I still place the ball in DJIs court.
I offloaded some video from the SD card yesterday, deleted the files, emptied the trash can, checked the info and still had a space discrepancy. I formatted the card and after the batteries were charged I checked them on the drone like always to make sure the batteries are healthy for the next flight.
I got an error saying the SD card was not compatible. I used the app to reformat the card and the error went away.
Maybe it is just best to reformat through the app rather than on the computer.
AG0N-Gary Posted at 2016-6-7 20:36
By the way, CUT AND PASTE has a danger that some people don't think of. I was warned early on in di ...
Another myth. Windows will not erase the source file until it confirms the complete file made it over. This may not true 10 years ago but it is true now.
I suggest you do NOT format it in your computer. The FAT will limit any file to 4 GB. This is a problem when taking 4k video for a long time. Just format it in the Phantom and you can record past the 4GB limit.
Finally! I got an answer to my long ago question on this forum as to why the video would only go 4 gigs and then create a second for the balance of the flight. Thank you. I will try it out today.
Which aircraft are you talking about? The P3 certainly formats in FAT32 and will always split the files at the 4K boundary. I don't have a P4, so I can't say what it does.
Geebax Posted at 2016-6-17 08:56
Which aircraft are you talking about? The P3 certainly formats in FAT32 and will always split the ...
Yep, I too was intrigued by that affirmation, but I could not test yet if the P3 family in any of its incarnation would ever format in exFAT. Possibly by setting the camera to shoot in 4K first?
Not that I have found. There is no way of selecting which format is applied in the aircraft, but it does support both FAT32 and ExFAT if you format externally. Either way, it still splits the files at 4GB boundaries when you shoot.
It is always best to format in the camera anyway, as the process also sets up the directories and hidden files that the Phantom needs. This rule really applies to any camera. Sony in particular, have a habit of setting up a pile of nested directories, so if you format outside the camera it does not always accept it.