Users who know the Windows system should know the dll file, that is, dynamic link library, containing code, data, etc. that can be shared by multiple programs, generally not large, most of them are dozens of KB, more than 1MB even the top day, but have you seen 259GB of giant dll file?
Foreign netizen “Andrewmackoul” accidentally found such a “monster” in the Windows 10 system, its file name is microsoft.applications.telemetry.windows.dll, located in the personal system documents under the AppData .Local directory, the size is shown as 259GB!
In fact, the normal volume of this file should be 1.1MB, the normal use is to collect system telemetry data code base.
As to why it has become so large, no exact cause has been found, and the analysis may have been a bug in one of its programs, resulting in unexpected writes of large amounts of data.
In fact, Windows 10 has been controversial about the search and collection of personal information, and Microsoft is constantly improving what data is left to the user, but it’s impossible to shut it down completely.