How to permanently delete files of NAS?

Since I'm returning my NAS, I wanted to permanently delete my personal files off of it. I'm pretty sure simply pressing the delete button won't do it as the data itself is not over-written. Are file shredders actually effective on NAS? I'm currently using the one included in AVG Spyware.

 

not realy unless you can do full format on nas but that problay best you can do

or overwrite it wish junk

 

All I can say is just overwrite it with a massive file, heh, can you just make like say a huge uncompressed video the size of the drive and have that overwrite the whole thing. Other than that, I don't really think there is a successful way of getting rid of something without overwriting it.

 

The strange thing is, it won't let me reformat. If I try to overwrite the entire drive, it's going to take a long time - (average 6mb/s. 300GB capacity 300*1000/6=50,000 sec = 14hr of continuous transfer!!!). Besides, my notebook's HD is only 100GB

 

The PGP file shredder should work.

 

That is a great file shredder, but no one has answered my question yet - are file shredders even effective on NAS? I thought that my computer doesn't know (or care) where the file is stored on the NAS - it just tells the NAS to write the file to the disk while not specifying where the data is to be physically stored. Won't this be a problem for file shredders as they need to know where exactly the file is stored (ie the block)?

 

I don't know the specifics of how it works, but I'm 99% certain that a file shredder will work on a NAS. Have you tried it yet? I would try it, and see what happens.

 

I'm doing it now. I'll see what happens and post the results