If your goal is mobility (not piracy), here is the correct, legal, safe workflow:
A single Maxon One subscription allows you to install Cinema 4D on (e.g., desktop, laptop, studio workstation). You simply log in with your Maxon account. This is effectively "portable" across your own devices, albeit with installation required. maxon cinema 4d r26 portable
It is strongly recommended to avoid portable versions. If your goal is mobility (not piracy), here