Point FastFolder at a drive and it tells you what's eating it — biggest folders, biggest files, biggest file types. Built for support desks, so the answer lands on the clipboard ready to paste into a ticket.
FastFolder doesn't bundle a runtime, which is why it isn't a 60 MB download. Install it properly, or carry the single exe on a USB stick.
Signed setup wizard — installs to Program Files with shortcuts and a proper uninstaller, and fetches the .NET runtime if the machine doesn't have it. /VERYSILENT for unattended rollout.
Copy it to a USB stick or a share and run it. Nothing to install, no admin rights needed to deploy it.
One prerequisite: the .NET Desktop Runtime 8 or newer (x64). The installer checks for it and, only if it's missing, downloads it from Microsoft and verifies Microsoft's signature before installing it. The portable exe relies on the standard Windows prompt, which links to the same download.
Focused, not bloated — the DataHaat way. FastFolder answers one question properly and gets out of your way.
Clicking a drive lists that level in milliseconds, even on a 4 TB volume. Nothing recursive ever starts from a single click.
One tab lists the biggest files anywhere in the measurement, biggest first. This is usually the whole answer.
Grouped by extension, so a runaway pile of .log, .bak, .iso or .vhdx files gives itself away.
A used/free bar for each volume, amber past 75% and red past 90% — you can see the problem before you click it.
Starts as a normal user with no UAC prompt. When a profile or system folder says "access denied", elevate from inside the window.
Copy a plain-text summary formatted to paste straight into a ticket, or export whatever tab you're on to CSV.
FastFolder checks DataHaat for new releases and verifies the SHA-256 of what it downloads before installing it.
A dark look for long shifts and a light one for daylight — it remembers which you chose between runs.
Most analyzers make you wait for a full recursive scan before showing anything. FastFolder separates the cheap operation from the expensive one, so you only pay for the deep walk when you actually want it.
Listing is instant. Click a drive or double-click a folder and you get that one level — subfolders, plus the files sitting directly in it at their real sizes. Often that alone finds the culprit.
Measuring is deliberate. Press F5 or "Measure this folder" to walk everything underneath, with a live progress bar. Until then, subfolders honestly read not measured rather than showing a fake zero.
Then the shares appear. Once there's a total, each row gets its share bar and the summary cards fill in — total size, files, folders, unreadable folders and elapsed time.
Right-click any row for Open in Explorer, Copy full path, or Scan this folder as root.
Free, signed and half a megabyte. Install it on the machines you support and stop guessing where the space went.