What Is TRS Driver
TRS Drivers is common for Toshiba Products and label as "special" drivers by Toshiba website. The main function of the TRS driver according to Toshiba technical support is for the DVD player codec. It will allow codecs to be updated.
Is it Important?
It is base on your situation, current software and windows system already provide the basic and advance codecs to play videos and Audio file. If you do not have problems to play your media files then it is not important and you don't have to install it.