After playing around with some configurations, pcmanfm sorting files can be edited at .~/config/pcmanfm-mod/main
Code:
[General]
terminal=roxterm
[Window]
width=640
height=480
splitter_pos=160
maximized=0
[Desktop]
show_desktop=1
show_wallpaper=1
wallpaper=/mnt/main/vectordb/hyoka-you-can_t-escape-anime.jpg
wallpaper_mode=2
sort_by=0 # 0 by name , 1 by size, 2 by type and 3 by mod time.
...
