I've attached a TXT flight record. I poked around for the mobile DAT file but I have no folder or files for it. I guess this is a common problem for Android users.
That flight data looks like this:
DJI Flight Log Viewer - PhantomHelp.com
This flight is not ideal for checking GPS stability because most of the flight is down low in a forested area.
The GPS Health was rated at 4/5 until 11:56.5 when the drone was 39 ft above the level of the launch point.
I looked at data from a section of the flight where the GPS Health was was 5/5 and the drone was in stable hover.
This was for 13.5 seconds (136 data records) of the flight from 11:59.1.
Here is a screenshot of some of that data:
You can see that the GPS location data (blue & yellow) is varying with each 1/10th of a second.
It's quite normal for GPS to do this and variation of 1-2 metres happens all the time.
It's the amount of this variation that matters.
In the 72 records I used as a sample the longitude variation was quite small.
The variation in latitude was 0.00000131 of one degree.
Since one metre = 0.00001 degree of latitude (approximately), the amount of variation exhibited is trivial.
At least for this small section of this flight, the GPS location data is reliable and not wandering to any significant degree.
To check further, the ideal flight data would be from a "flight" where teh drone is just sitting (not flying) for 5 minutes or so.