I took apart some old PCs that were in my house and got 3 HDDs out of them. Unfortunately, its almost guaranteed that they have some type of malware or something on them. My question is,1.How would I go about formatting these HDDs to get rid of the viruses and 2. Would connecting them to my current PC infect that PC? I plan to use 2 on a new PC and another as an external/portable hard drive.