Complex sentence: Each of the aforementioned methods has to have contact with the host system's hard drive, in some form or another, meaning that even when employing the stealthiest anti-forensic methods, some form of the infected residue will be left on the host media.
Split into simpler sentences: Each of the aforementioned methods has to have contact with the host system's hard drive, in some form or another. Meaning that even when employing the stealthiest anti-forensic methods, some form of the infected residue will be left on the host media.