So, take a look and gain some Intel on the topic. Here, we have listed how you move the files to trash and delete them from Google Drive too. How to Delete Files and Empty Trash in Google Drive Files can get deleted by mistake too and that's why it is better to empty the Trash manually.
Usually, people delete the files which are no longer needed and if the files still exist in the Trash then they are simply useless. There are various reasons why the users would like to empty Google Drive trash. How to Recover Deleted Files from Google Drive Trash Fix 'Google Drive Empty Trash Not Working'
