I have a late 2012 Mac Mini and it is very (very) slow. The spec is 2.5GHz dual core Intel Core i5 processor, 16 GB 1600 MHz DDR3 and I have 500 GB of storage of which 292 GB is available. It was running very slowly and Apple last week installed the latest version of Mac OS Catalina (10.15.5). That has made little or no difference - I think it is actually running more slowly now. It has been suggest that one way to speed it up considerably is to install 1TB SSD at a cost of £200. Is this worthwhile or would it make little appreciable difference? Would I be better off buying a 2014 or 2018 machine. I want to minimise expenditure but I want a computer that actually works and I am prepared to pay for it. If anyone has any ideas I would be very grateful. Please speak in simple terms since I am not very techie!