It erases EVERYTHING on the card. It’s basically a more in-depth erasing of data. If you delete files, they’re still there, they’re just not able to be found without special software. Also, if you’re ever formatting the card in your computer, uncheck “quick format”. It takes longer but it’s a more complete erasure of the card than quick format.
In some situations it’s best to format it in the device (drone, camera, etc.) but I’ve never had any issues formatting my cards in the computer.Ok thank you. I just got a new SD card for the phantom and I saw in the DJI GO 4 app that I can format it