i can’t see your last reply on this thread for some reason. Here is the screenshot requested. Hard drive icon is present again in normal mode.
Im getting somewhat out my depth here but I’ll try and explain in my non technical language what’s happening at the moment. Here is a screen shot to help me explain.

the left hand pane is my hard drive in normal mode. I cannot highlight/access the greyed out info. The only thing I can do with the files next to this is click and drag them, I can’t double click or use the drop arrow (greyed out).
The right hand pane is my external drive which I am updating at this point.
I said previously that I can open internet, software etc however it’s glitchy, usually when filling in a field on a form or creating a new folder - I am unable to rename (I get the audible ‘no’ sound).
The machine is unusable - on quite a basic level in terms of simple tasks.