Visual Studio 100% disk usage

(Comment for others landing here as @Marta explains that the problem no longer persists on their machine.)

In general, any performance issue in Visual Studio should be reported to Microsoft. It's easy to do this directly from VS using the Report a Problem tool. That feature will automatically attach logs/traces which are shared privately with Microsoft. Internally, tooling will analyse those attachments to assign a ticket to the relevant team. With such attachments, there is a high likelihood that the problem can be diagnosed and fixed in a future release of Visual Studio.

Instructions on the Report a Problem tool:

https://docs.microsoft.com/en-us/visualstudio/ide/how-to-report-a-problem-with-visual-studio?view=vs-2019

If you prefer to diagnose high disk IO yourself, FileMon can be a useful tool:

https://docs.microsoft.com/en-us/sysinternals/downloads/filemon

It could be related to Visual Studio updates - which would show under C:\ProgramData\Package Cache.

A disk space management tool like TreeSize Pro will help figure it out though ... it will show which directory is using the most space. You can then target what aspect of Visual Studio is eating up your drive space.

There is a free trial at https://www.jam-software.com/treesize/

You can also use this tool to export and post a screenshot / export of the usage here and it may help identify what is going on.

I had a similar issue that turned out to be the built-in git provider having issues with large codebases containing a moderate-to-large amount of changes before a commit.

Changing to a third-party one fixed the issue.