How to restore or recover deleted Google spreadsheet files?
To restore the deleted file,
Step 1: Click the Sheets home icon.
Step 2: Select "Google Drive" option.
Step 3: Click "Trash".
Step 4: Select the check box of the spreadsheet file to be restored.
Option 1: Click "Restore" button.
Option 2: Right-click and select "Restore from trash".
Step 5: File will be restored from trash and moved to Google Drive.