How do I modify file permissions ?

steve2006 Posts 3 Registration date Tuesday July 29, 2014 Status Member Last seen December 14, 2014 - Dec 14, 2014 at 02:49 PM
On an external hard drive I have about 500 GB of old back-up files which I no longer want. So I thought I would delete them. But this has so far proved impossible. I keep getting messages telling that although I am the Administrator (and the only person who ever uses the laptop to which the HDD is attached), I am not "allowed" to modify the back-up files.

I can see some sense in protecting such files as they may be the only tool to resurrect a dead system. But at the same time, they are a dead issue now and I need the space they are occupying.

Can anybody help, please ?

Thanks in advance,