Before diving into BlueStacks, let's clarify terminology. A true portable application (like PortableApps.com versions of Firefox or GIMP) has three characteristics:
The software is designed to be installed directly onto your system to interact with hardware virtualization, which is necessary for high-performance Android emulation. While you might find "portable" versions on third-party sites, these are unofficial and carry significant security risks. BlueStacks Support
Unofficial versions are frequently bundled with adware, spyware, or miners. Performance Issues:
If absolute portability is non-negotiable, switch to a cloud-based solution like BlueStacks X or carry a lightweight laptop that already has BlueStacks installed. Trying to force a square peg into a round hole will only lead to security headaches.