If you have worked on SharePoint 2010, you must have come across .usage file in LOGS folder. Location of this file is hive-folder/Logs.
The main issue with .usage file is you can not delete all the files and additionally these files will keep growing in numbers and in the result, your drive space will keep reducing.
The action can’t be completed because the file is open in SharePoint 2010 Timer
As per Microsoft website, the main reason behind .usage file issue is –
This happens when Windows updates KB 2775511 or KB 2682011 or KB 2882822 are applied to the SharePoint servers.
Once you run above command the .usage files are released and deleted automatically.