Where are hardware drivers located?

Hello,

I have a TS-131P NAS (arm32v7), and I would like to connect a USB TV stick to it (Avermedia AverTV Volar HD), to be used with NextPVR. I downloaded the drivers for Linux, tested them successfully with Ubuntu, placed the files under /lib/firmware/ in my NAS, then I plugged the TV stick in, but it is not detected… The following commands return no TV stick detected:

sudo dmesg | grep dvb
lsusb
ls /dev/dvb

Maybe I didn’t place the driver files at the right location? Is there anything else to have the NAS detect this new device?

Thank you!