"Directory not empty" sudo rm -r -i "file name" not working
First, I would be sure no files are locked
sudo chflags -R nouchg Local\ Storage
Then, assuming you are sure about using sudo and rm -rf on your backup drive, you could tell rm to force things.
sudo rm -rf -i Local\ Storage
This is caused by corrupted entries in the drive. The steps below solved my problem.
- Open Disk Utility
- Choose the partition/drive
- Under the First Aid tab click Repair Disk
The file should be gone after this, if not just try empty trash again. It should work.