Take your ideas anywhere with Microsoft OneNote. Whether you're on a smartphone, tablet, or using a web browser, your digital notebook is always within reach. No installation is required when using the web version, making it the perfect solution for users who need a "portable" note-taking experience on the go.
You install a full copy of Windows 10/11 onto a high-speed USB 3.2 SSD (128GB minimum). You boot the host computer from that USB drive. Once booted, you install Microsoft OneNote normally onto that portable Windows environment. Microsoft Onenote Portable
Use OneNote for the web:
Never use a "Portable" version of paid software unless you built it yourself or trust the source absolutely. Stick to the official web app or Windows To Go. Take your ideas anywhere with Microsoft OneNote
If you use the OneNote desktop app (the version included with Microsoft 365 or Office 2019/2021), you can choose to store and run your notebook files directly from a portable storage device. What's the difference between the OneNote versions? How it works: You install a full copy