I've decided to buy a new drive and install it. Having looked on here on how to run fix-disc I've come to the conclusion that I'm not sufficiently computer savvy to be able to do it. My PC is upstairs and I presume I'll have to obtain a dongle for my PVR in order to be able to connect it to my my PC via WiFi. My Samsung Smart TV is connected to the net via a LAN cable and TP Link. I thought that I would be able to put the file on a USB stick but it appears that that is no longer possible/recommended.
Thank you to everyone who has responded to my original post.