Macbook Clearing Harddrive My Macbook Pro Wont Delete Certain Items On My Portable Harddrive?

My macbook pro wont delete certain items on my portable harddrive? - macbook clearing harddrive

are tempted, in fact, come at least 3 months and had hitherto always delete them from my portable hard drive and I was able to retire until it is not clear the data on my hard drive error message as follows ...

"The operation can not be completed because it has sufficient privileges for some of the problems"

please help cos what I really thank you nuts