Suddenly cannot delete anything from external hard drive

Hey everyone,

I have been using a Seagate 1TB external hard drive (Mac OS Extended Format) to archive some of my videos for the past 6 months. I have been using it with no problems whatsoever until now. Today I fired it up and tried to delete a few files from the drive and nothing happens. I drag the files to the trash and hit "Secure Empty Trash" from the finder menu. I hear the "crinkle" sound of the trash emptying, but when I look in the trash the files are still there...it refuses to delete the files.

None of the files are locked and I have full permissions on both the hard drive and the files. I have never had a problem deleting files until now.

Any thoughts on what is wrong and how I can fix this?

Thanks

 

I tried doing that, but the option to repair permissions is greyed out. Same when I tried with Disk Warrior.

 

Nevermind...I just rebuilt using Disk Warrior and it works again. Not sure what happened, but it's good to go again.

Thanks for the help.