Hey,
I took a couple of thousands photos with my DJI Mini 2 in the last couple of years. In almost all cases, I used its raw photo shooting mode which saves the photo both in .dng and .jpg format. I stored the files locally syncing the folders with OneDrive, then moved to iCloud Drive as I was changing cloud service. I stored all files online only.
I've just noticed that all the .dng files resolution became 960 x 540 pixel but its size remained the original, that is 17.7 - 18.5MB. The photos saved in .jpg are fine, 4000 x 2250 and 4MB.
What happened to the raw pics during all these moving and transfering over time? Can I recover the original .dng shots somehow?
Yes, I've just learned that it is the preview image. I used the default software on a PC for opening these. If I use Lightroom, it's OK.