I think I got it now.. I used to use this G Drive with a mac and when I use it with a Mac, it leaves the DS.Store files in folders.((It is hidden in the MAC OS and comes visible in Windows OS)
I deleted another DS.Store file that was in one of the folders within the G Drive and did a scan with MCS and it detected as a malware.
(when it didnt detect it as a malware when nothing is done to it)
For some reason, DS.Store files I have found in a USB stick that I used with a mac - windows the MCS did not detect any malware.
Should I attempt to get non-DS.Store files out of my G Drive and paste it to a new HDD then format the G drive so that it will be a fresh one?