How to move spreadsheet files to trash in Google Docs?
Move to Trash option will automatically save the deleted files in the trash drive till you permanently delete it.
To move a file into the trash, follow the steps given below.
Step 1: Click File → Move to trash. The file will be automatically moved into the Trash.
Step 2: Popup window opens up asking whether to move to drive or to continue.
To work with the file again, click Take out of trash.
To move to Trash-Drive click "Back to Drive" option.