We've all been there at least once. A computer system you rely on starts behaving erratically and slows to a crawl. After a bit of review, you realize that the system root drive is full, and Windows is very unhappy about the situation.
Find Largest Files on Windows
Whether the affected system is a server or workstation, you'll often need to take action quickly to restore functionality. In such cases, one of the first steps we recommend is using FolderSizes to create a Largest Files report for the affected volume(s).
Let's get started. In the FolderSizes main window, click the File Reporter button in the ribbon bar. Enter the file system path(s) of interest (perhaps the root drive path in this case) in the File Reporter location bar and click the Start button. FolderSizes immediately gets to work analyzing the specified file system path(s).
The screenshot below offers shows the Largest Files report contents. You'll probably notice immediately that a single .dmp file is consuming over 1.5 GB of disk space. In this case, it looks like Windows wrote out this memory dump after an unexpected system reboot (there was a recent power outage in this instance that's likely responsible).
In this specific case, deleting this one file may free up enough disk space to get the system running correctly again. There's likely more disk space analysis work to be done, but you can quickly spot multiple file removal candidates (which add up to many GB of wasted space) just from this one report alone. That's a huge win made easily accessible with the power of FolderSizes.