Well, I have many games installed right now, so it's only 46% space free on the logical drive. I'm running defragmentation tool every week, so they were unfragmented. And yes, it's NTFS.
After tagging every single picture becomes 6-12 fragments (10 in average), and that's quite unusual. I mean, why 6 at least, while jsons created by the tagger are never fragmented? And when I hunting for pics while making a pack, they are not that much fragmented, about 3-4 fragments at worst.