Can you set the steam deck as a plex server, with files stored on an external disk?

So you mean something like this: https://www.itgigant.nl/refurbished-computers/hp-8200-elite-tower-i7-4gb-250gb/ (with ram maxed out 32gb) and this: https://www.paradigit.nl/msi-gtx-1650-d6-ventus-xs-ocv1/21034633/product/3118 together +/- 460 euro