![]() The data collector set you just created should show up in the right panel. Click Finish.ĭouble click User Defined in the left panel and click the data collector set you just created (the example name was "Disk Space Free"). Select the location you'd like your logs to be located in. So, I put 1 in Sample Interval and changed Units to Hours. Like I mentioned, I wanted to see hourly data points. Set the Sample Interval to however often you'd like to have the data collected. That counter should now show up in the right pane titled Added counters. Now in the box below titled Instance of selected object: click C: and then below that Add >. Scroll down a little and click Free Megabytes (you can also select % Free Space if desired). Scroll until you see LogicalDisk and click the down arrow next to it. Click the radio button Create manually (Advanced), click Next. Right click User Defined -> New -> Data Collector Set.Įnter a name for your set, something like "Disk Space Free". In the left-most pane, double click Data Collector Sets. Open Windows Performance Monitor (Win-R -> type "perfmon.exe" -> Enter) ![]() Here's a step-by-step guide on how to set this up: Using one of the other output types allows you to make your own graphs of the data in Excel. Using the binary output, you can visualize the data in the perfmon itself. Perfmon allows you to output how much free disk space you have as values to a file that are comma-separated (can be opened in Excel), tab-separated (what Excel usually uses), or binary. I only needed hourly data points but I tested with updates every one second and it worked fine. It doesn't show any previous data so you'll only see disk space data from when you set it up. This tool comes built into the latest versions of Windows so you don't even need to download another program to see the data. You can see used disk space over time with Windows Performance Monitor (perfmon) to the MB with down to one second resolution.
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