What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Choose SquirrelDisk if you need a disk usage analyzer for macOS, Windows, or Linux, or want both sunburst and treemap views. Choose WinDirStat if you use Windows and value its sortable directory and file-type views plus documented investigation tools such as duplicate detection and file monitoring. Both are free and open source, but use different licenses. There is no substantiated scan-speed winner.
At a glance
| What matters | SquirrelDisk | WinDirStat |
|---|---|---|
| Supported systems | macOS (Apple silicon and Intel), Windows 10 and 11, and Linux, according to the SquirrelDisk press kit. | Microsoft Windows, according to the WinDirStat project site. |
| Views | Sunburst and treemap. | Interactive treemap, directory tree, and extension/type breakdown. |
| Notable features | Live chart, largest-folders list, remote SSH and cloud-storage scanning through rclone, and cleanup options. | Duplicate detection, file monitoring, search and filtering, scan controls, and configurable cleanup actions. |
| License | AGPL-3.0. | GPL v3 or later. |
| Price | Free, as listed by the project. | Free, as listed by the project. |
| Comparative scan-speed result | No matched, independently verified head-to-head benchmark is established by the cited official sources. | |
Which operating systems do they support?
Choose SquirrelDisk for macOS or Linux
SquirrelDisk lists macOS, Windows, and Linux support. Its current press kit identifies version 2.5.0, dated September 30, 2026, and specifies macOS on Apple silicon and Intel plus Windows 10 and 11. The SquirrelDisk site describes the application as a disk explorer for local drives as well as remote SSH and cloud storage through rclone.
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Choose WinDirStat for a Windows computer
WinDirStat describes itself as a disk-usage analyzer and cleanup assistant for Microsoft Windows. If the computer you need to scan runs macOS or Linux, its stated platform support makes SquirrelDisk the fit between these two; the cited WinDirStat materials do not list those systems.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →How do their disk-usage views differ?
SquirrelDisk: sunburst or treemap
SquirrelDisk presents storage visually with a sunburst chart or a treemap. The project also highlights a live chart and a list that puts the largest folders first. These options suit users who want to navigate a visual hierarchy or quickly focus on large directories.
#1 Best Overall
- Easily store and access 2TB to content on the go with the Seagate Portable Drive, a USB external hard drive
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
WinDirStat: directory tree, file types, and treemap
WinDirStat combines an interactive treemap with a sortable directory tree and an extension/type breakdown. This gives Windows users separate ways to inspect storage: by folder hierarchy, by file type, or through visual blocks. Which display is easier depends on whether you start with a large folder or a category of files.
Which tool has the investigation features you need?
WinDirStat for file-focused checks
WinDirStat’s repository documents duplicate detection, file monitoring, search and filtering, and scan controls, alongside cleanup actions. Those features make it a natural choice when the task goes beyond identifying large folders and includes finding or monitoring particular files. The project also documents scans of local drives, selected drives, folders, and command-line targets.
Rank #2
- Easily store and access 5TB of content on the go with the Seagate portable drive, a USB external hard Drive
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
SquirrelDisk for remote and cloud scans
SquirrelDisk highlights scanning over SSH and scanning cloud storage through rclone, in addition to local disk exploration. Its cleanup flow includes an optional secure-erase feature, according to the project’s product descriptions. These are vendor-described capabilities; availability and behavior should be checked in the current release before relying on them for a particular workflow.
Are they both free and open source?
Yes. The projects describe both tools as free and open source, but their licenses are not interchangeable: SquirrelDisk lists AGPL-3.0, while WinDirStat lists GPL v3 or later. If you plan to modify, redistribute, or incorporate either project’s code, read the applicable license rather than assuming the obligations are identical.
Rank #3
- Easily store and access 1TB to content on the go with the Seagate Portable Drive, a USB external hard drive.Specific uses: Personal
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop. Reformatting may be required for Mac
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
Is SquirrelDisk faster than WinDirStat?
No reliable speed ranking is established by the official descriptions cited here. A meaningful comparison would need to hold hardware, filesystem, scan target, permissions, and settings constant; scan times from different machines or configurations would not establish a general winner. Neither project’s feature description alone supports a claim that it scans faster.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Where should you download WinDirStat?
Use the project’s official channels: the WinDirStat GitHub repository identifies the Microsoft Store, listed package managers, official GitHub releases, and links from windirstat.net as sources. Avoid unofficial download mirrors. For SquirrelDisk, start at its official website.
Quick Recap
Best Value
- [Upgraded Version] - This external hard drive features a mirrored logo stripe combined with a striped anti-slip design, and the rounded corners of the casing make it easier to grip. The stripes also have a heat dissipation function, ensuring stable and fast data transfer.
- 【Ultra-thin and quiet】 - The motherboard adopts JMicron 578 noise-free solution, giving you a quiet working environment. Lightweight and portable size designed to fit in your pocket for easy portability.
- 【Ultra-Fast Data Transfers】 - Pairing this external hard drive with JMicron 578 solution USB 3.0 and USB 2.0 interfaces enables blazing-fast data transfer. It boasts theoretical read speeds of up to 125MB/s and write speeds of up to 103MB/s.
- 【Plug and Play】 - With no software to install, just plug it in and the drive is ready to use.The hard disk chip is wrapped with an aluminum anti-interference layer to increase heat dissipation and protect data.
- 【What You Get】 - 1 x Portable Hard Drive, 1 x USB 3.0 Cable, 1 x User Manual, Gift-type shell packaging ,Three-year manufacturer's warranty and free technical support services.
Rank #4
- Easily store and access 4TB of content on the go with the Seagate Portable Drive, a USB external hard drive.Specific uses: Personal
- Designed to work with Windows or Mac computers, this external hard drive makes backup a snap just drag and drop
- To get set up, connect the portable hard drive to a computer for automatic recognition no software required
- This USB drive provides plug and play simplicity with the included 18 inch USB 3.0 cable
- The available storage capacity may vary.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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