file deletion from usb drive??

[bruce]

Hi,

Created external 500G usb hard drive,
Added ~300G of dirs/files to it

I can see the files from the mounted drive, via the "Computer" icon of
the desktop.

Here's the tricky issue!

I drill down in the drive/dir icon to get the target dir, which has
1000s of files in it. I select a few using the mouse, select the "move
to trash" menu item, and after it says it's moving files to the trash,
I do a refresh/reload, and the files are still there!!

So, just how do I delete files from the external drive!

Thanks