If it works for you, then great, but here's an article from almost 10 years ago where Apple discourages defragging[1]. There's a bunch of other articles with more specifics showing that advanced defrag features from the 90s were built into the OS years ago[2].
The red slivers towards the lower middle are where the reported fragmented files are located, and the lower right is the fragmented files listed by number of fragments descending.
The anonymised .mkv files are training videos with multiple language and subtitle streams. They're exported to a scratch drive and then copied to the the drive they currently reside on.
After a full, offline defrag (including a b-tree rebuild) the legend for defragmentation is a neatly arranged list of that blue/grey colour, no red to be seen.
https://imgur.com/bdGcXXC
The red slivers towards the lower middle are where the reported fragmented files are located, and the lower right is the fragmented files listed by number of fragments descending.
The anonymised .mkv files are training videos with multiple language and subtitle streams. They're exported to a scratch drive and then copied to the the drive they currently reside on.
After a full, offline defrag (including a b-tree rebuild) the legend for defragmentation is a neatly arranged list of that blue/grey colour, no red to be seen.