You are lucky, 25 yrs no hard drive failures… I had a couple HD faillures in the same time frame, different brands, nevertheless, hardware will died sooner or later. You mentioned recovering files, hence I mentioned backups. Keep them updated
Speed are fine for this device, you got to get to know where the limitations are, as well as your network. I have a 10/100 network and it is pretty decent, but I know what the max will be.
Anyhow… Good luck, here it is…