Mohave tried to load to update my computer. In the past it said there was not enough space. This time it tried to load and I got this error. 4hdd/11/4000000;sata(0,0)

Please read Mac notebooks: Apple Hardware Test may report "HDD" alert. It may be applicable. If the error is authentic then either the hard disk drive / flash memory module may be defective. A faulty interconnect cable is also possible. A related logic board fault may also be present, but it far less likely than the other two causes.