Writing for MakeUseOf, Oluwaseun Bamisile describes repurposing a neglected 16GB drive previously used to reinstall Windows 11. Instead of leaving it in a drawer, he installed PortableApps and assembled software he could launch when using another PC.
That is a useful second career for an aging stick. But the distinction matters: you are carrying your tools, not bringing your own trusted computer.
A portable toolbox, not portable Windows
PortableApps provides a menu for organizing and launching compatible applications without installing each one into Windows in the traditional way. The applications still run under the host computer’s operating system. Think of it as a traveling toolbox rather than a miniature PC hiding inside a USB connector.
Bamisile’s setup also includes documents and media folders on the drive, with shortcuts accessible through the launcher. He reports keeping familiar application settings and bookmarks alongside his software.
The underlying portability specification adds an important qualification. PortableApps-format applications may change local files and registry entries while running, provided those changes are restored to their previous state when the application exits. The specification also requires applications to preserve their settings when the drive letter changes between computers. That is a design requirement—not an independently verified guarantee that every application, crash or interrupted session leaves no traces.
The practical benefit is continuity: familiar applications and preferences can travel together. It is not isolation from the host PC.
The catalog is not exclusively open source
One detail in the MakeUseOf account needs correcting: PortableApps does not limit its directory to open-source software.
The official directory explicitly includes both open-source applications and freeware. Those labels are not interchangeable: freeware can be available without payment while retaining proprietary source code. The directory also distinguishes more than 500 applications from over 1,400 packages, which include language and release-channel variations. Treating every package as a separate application would exaggerate the selection.
Google Chrome illustrates the distinction neatly: PortableApps lists it as freeware. The platform itself is open source, but that does not make every application distributed through its catalog open source too.
The centralized updater is arguably more useful than the headline catalog size. PortableApps documents automatic application updates, reducing the need to maintain a collection of separately downloaded portable utilities by hand.
How to set up an old USB drive
For this Windows use case, start with a writable drive, adequate free space for your chosen applications and permission to run software on the destination PC. Back up anything important before repurposing the drive.
PortableApps’ official support instructions give this basic procedure:
- Download and run the PortableApps.com Platform installer from its official site.
- Choose the USB drive as the destination. PortableApps recommends its root directory—for example,
X:\, substituting the actual drive letter. - Open
Start.exein that directory to launch the menu. - Select Apps → Get More Apps…, choose how to browse the directory, select applications and click Next.
- Launch an installed application from the menu to confirm the setup works.
As a practical check, save a non-sensitive test document to the USB drive and confirm its location in File Explorer. Do not assume that every application’s default save destination is the removable drive.
When finished, close every portable application, wait for drive activity to stop, then use the launcher’s eject control. PortableApps specifically warns that disconnecting a drive during writes can lose data. The USB connector is not a substitute for a Save button.
Local folders and OneDrive are alternatives
Bamisile also reports keeping a copy of his collection in OneDrive. That fits the platform’s documented support for synced cloud folders and local installations; the USB drive is an option, not a requirement.
These arrangements solve slightly different problems:
- USB installation: carries the collection physically between computers.
- Local installation: keeps portable applications together on one PC.
- Synced-folder installation: uses a cloud service to distribute the collection between configured computers.
Do not interpret cloud-folder support as a promise that every application tolerates simultaneous use or synchronizes every setting perfectly. A sensible precaution is to close applications and let synchronization finish before switching computers.
If Windows blocks an application, investigate
The MakeUseOf account raises the possibility of Microsoft Defender interfering with an installer. It does not establish a widespread PortableApps-specific detection problem—or prove that a warning is a false positive.
For Windows 11 and Windows 10, Microsoft documents Windows Security → Protection history as the place to review Defender actions. Expand the relevant event to inspect the details; reviewing threat details requires administrator privileges. Microsoft advises choosing quarantine when a file’s safety is uncertain.
Do not disable protection merely to get a portable application running. On someone else’s computer, leave security decisions to its owner or administrator. Microsoft also notes that organization-managed devices may restrict access to Windows Security features.
The same caution applies to sensitive work: portable applications should not be treated as a security boundary. Their own specification permits interaction with the host’s files and registry.
A worthwhile reuse—with realistic expectations
The strongest case for this USB-drive makeover is convenience, not magic. PortableApps supplies a documented way to organize applications, preserve portable settings and maintain a collection across USB, local and cloud-folder deployments.
Start with a small selection you actually use, keep a separate backup of important files and test the workflow before depending on it. An old flash drive need not become your entire digital life to earn its place back in your pocket.