I truly appreciate the time you have all taken over your replies. Many thanks.
As I said at the beginning, I was hoping for a simple step-by-step procedure. Although not technically illiterate, I have reached that advanced age/stage where I am not so proficient as I was. I am not trying to play the typecast age card, because I think I do fairly well with technology generally!
I tried extensively for some time before I posted, so you get a bit mind-boggled after a while.
These are my resources:
I still have the defunct Fox HDR T2 with the address on the case. I put the 2 TB Hitachi H.D. into an external SATA USB caddy. It still seems to be fine. I can see all the file headings and subheadings when I connect it to my Chromebook (being Linux based I assume). I have an external WD 1 TB USB HD with 25% space remaining, which I can use for file transfer. I have a mini Windows 11 PC with 256 gb HD I can also use.
Before the Fox HDR T2 finally stopped working, I had to repeatedly switch it off and on to get it to connect to my Sony Brava Android TV. The switching off and on got more frequent until all that was on the screen was the Humax logo and version number, no matter how often I switched it. It is 14 years old so did well to this point! I thought it was a handshake problem after a possible Sony update. I therefore spent a lot of time trying to get it to connect by spending time on both the Sony TV and the Humax. I should have been more astute and copied the files before it finally gave up, but I am where I am!
I don't really want to buy another cheap Fox HDR T2 on Ebay, if I can help it, as that may not be straightforward.
If anyone can provide a simple but effective step-by-step, and not overly complicated procedure, utilising the above resources, that will definitely work, I will have another look to see if I can recover the files.
Thanks again