Got my Mavic last week and took her out flying over the weekend. Really enjoying it and after my first flight on Sunday I noticed the app could do an auto-edit based off the cache files.
I took a look and it was really interesting, showed some people but didn't save it, flew again and obviously that cache was overwritten.

There really should be a way to change the destination of the cache to an external SD if available, as internal space is usually at a premium on phones.

You can edit "Maximum Video Cache Capacity" from General Settings view. Scroll 2/3 down and you will see that. Im holding my cache size 4GB.

Oh sure, I've changed mine from the 2Gb that was set to 8Gb, but I'd prefer to allow it to go to my external SD where I could have a 30Gb+ cache!