How to empty the trash securely for 200GB files

Hello All,

I have "Recovered Files" in my Trash which are proving difficult to remove.

The recovered files turned up in my trash after my mac crashed during an Erase Free Space process. Then the files it was creating (apparantly it writes over all free space, creating a new file, before deleting it) is called EFTFile1.sparseimage and anther called EFTFile2. One is woth 166Gb and the other is 55GB.

I then click the "Empty Securely" button. It starts to empty (i have done many times) but nothing happens. A window opens with the usual emptying trash, but it stays there for a very long time. about 10 hours it took last time before i decided to relaunch finder.

HOw long should i expect this to take!? to erase about 200GB of data split into 2 files?!

I'm scared i will never get my harddrive space back.

Sam