harrymc, you should be banned from answering SMART and hard drive questions as this is not the first time you are giving wrong answers and ignoring the elephant in the room!
Reallocated sector count is 880. The temperature stays above 50°C. Is this a hard drive failure?
880 reallocated sectors is a sufficient reason to replace the dying disk.
For a rotating hard drive 50°C is already dangerously near the maximum allowed temperature. That temperature is increasing wear.
What is your ambient temperature? You should provide cooling for your drive to make your disk approach a hopefully much lower ambient temperature instead of heading towards the maximum allowed temperature.
If a possible successor of your drive is being put in that thermal environment, he won't live long.
Try to format the disk using a slow (not quick) format, which will rewrite all the sectors. Check the
Any variation of a window format command will delete stuff on the drive. This is a irresponsible hint!