Sure, most of it is GoPro images, 999 images and usually ~2.2GB per directory.
In a run there usually are 1-30 such directories (some might have less images).
While time taken is a bit of a concern for me, my previous external disk I used for Mapillary processing died - reducing useless disk activity seems very attractive 
A few examples of these processing steps:
Processing: 100%|██████████| 35/35 [00:02<00:00, 14.99images/s]
Test EXIF writing: 100%|██████████| 35/35 [00:00<00:00, 42.49images/s]
Processing: 100%|██████████| 999/999 [00:52<00:00, 18.92images/s]
Test EXIF writing: 100%|██████████| 588/588 [00:27<00:00, 21.60images/s]
Processing: 100%|██████████| 498/498 [00:27<00:00, 17.95images/s]
Test EXIF writing: 100%|██████████| 344/344 [00:07<00:00, 48.51images/s]