Here's a Fluttershy image file that looks "AI generated", but someone saw that this image is from 2015 = isn't:
https://derpibooru.org/images/3470223
https://www.deviantart.com/alumx/art/Yellow-pony-555885868

 >>/11227/
> Finished rechecking sync-ness
Rsync with zero transfers via the following command (only the 16M sync was HDD->HDD):
> $ rsync -a --size-only --info=progress2 /src/ /dest/
. check 832,468 files = 2024-10-19T10:04:22.001500978Z -> 2024-10-19T20:34:36.036992670Z = 37,814 seconds = 10 hours 30 minutes
. check 15,989,518 files= 2024-10-19T10:16:06.816779785Z -> 2024-10-21T04:40:02.185806987Z = 152,636 sec. = 1 day 18 hr 24 min.

Collect file metadata via hs2sf (my code "hs2s" in a function; it's nice useful Bash code, but doesn't output JSON):
. 832468 files = 2024-10-21T11:56:42.598064886Z -> 2024-10-21T14:58:18.564940821Z = like 3 hours = ~500 MB text file (uncompressed)
. 15989518 files= 2024-10-21T15:02:34.785227325Z ->2024-10-23T03:34:39.070120115Z = 131525 sec = 1d 12hr 32min = 9.23 GiB text file

This:
> $ zstd -5 zb.txt
compressed the 9 GiB one to a 1.84 GiB (1,977,966,947 B) .zst file. With no -#, zstd's default compression level is 3, and that was:
> zb.txt.zst = 1.91 GiB = 2049326728 bytes

Next steps: delete + maybe copy metadata files.