/usr/lib/pd/extra/ is in pd-autopreset 0.10-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/pd/extra/AutoPreset/
/usr/lib/pd/extra/AutoPreset/0autopreset-help.pd
/usr/lib/pd/extra/AutoPreset/ap_testabs.pd
/usr/lib/pd/extra/AutoPreset/apf-help.pd
/usr/lib/pd/extra/AutoPreset/apf.pd
/usr/lib/pd/extra/AutoPreset/apgetdol0.pd
/usr/lib/pd/extra/AutoPreset/apgetref.pd
/usr/lib/pd/extra/AutoPreset/apgetval.pd
/usr/lib/pd/extra/AutoPreset/api-help.pd
/usr/lib/pd/extra/AutoPreset/api.pd
/usr/lib/pd/extra/AutoPreset/apmaster-help.pd
/usr/lib/pd/extra/AutoPreset/apmaster.pd
/usr/lib/pd/extra/AutoPreset/apmasterfile.pd
/usr/lib/pd/extra/AutoPreset/apsarray-help.pd
/usr/lib/pd/extra/AutoPreset/apsarray.pd
/usr/lib/pd/extra/AutoPreset/apsubmaster-help.pd
/usr/lib/pd/extra/AutoPreset/apsubmaster.pd
/usr/lib/pd/extra/AutoPreset/apsym-help.pd
/usr/lib/pd/extra/AutoPreset/apsym.pd
/usr/lib/pd/extra/AutoPreset/aptab-help.pd
/usr/lib/pd/extra/AutoPreset/aptab.pd
/usr/lib/pd/extra/AutoPreset/p/
/usr/lib/pd/extra/AutoPreset/p/basic.txt
/usr/lib/pd/extra/AutoPreset/p/float.txt
/usr/lib/pd/extra/AutoPreset/p/more.txt
/usr/lib/pd/extra/AutoPreset/p/patterns.txt
/usr/lib/pd/extra/AutoPreset/p/sendreceive.txt
/usr/lib/pd/extra/AutoPreset/p/subs.txt
/usr/lib/pd/extra/AutoPreset/p/types.txt
/usr/lib/pd/extra/AutoPreset/presetfadecos.pd
/usr/lib/pd/extra/AutoPreset/presetfadelin.pd
/usr/lib/pd/extra/AutoPreset/splitpath.pd