Cloned hard drives, how do I get rid of one?
A while ago, I cannot remember how, I somehow cloned my hard drive. (I think it was me trying to install linux or Windows) Today I was cleaning up my desktop, and I am trying to get rid of one, as it is very annoying and hard to navigate. Help would be welcome. Thanks. (iMac 2017, 27")
iMac 21.5″