Hi FarVoice,
Thank you for the great tip

I don't have the gpl firmware the patriot website doesn't show the player anymore

So I brute forced it

I have found that the : gpio 93 is the HDD led
81 is the USB led
44 turn's off the player.
78 send the off command.
I have compared vrtn and the pohd skin. The pohd does not look at the aPower configuration for example if turn off the led ( $gpio 81 0 ) in the start section of aPower there is no changes the led are on even if the firmware detects no HDD or USB are plugged in. So I decided to use the vrtn skin instead. in section drive how can I turn on $gpio 81if I plug a USB stick?
I used the Asus O!Play R1/R3 as an example but the { if ["$ACTION" == 'add']; then $gpio 81 1...} does not work

can you give more great tips ?
Thank you so much,
Pbodev