Securely wiping a usb drive

[Guest]

I bought a usb drive recently, but am going to return it because it is
too slow. I did copy some files containing personal info onto the
drive though, so I want to make sure I wipe it off. Is it enough to
format the drive? Or should I fill up the drive with non-personal
data to make sure that my personal data got overwritten?

 

[Rod Speed]

I bought a usb drive recently, but am going to return it
because it is too slow. I did copy some files containing
personal info onto the drive though, so I want to make
sure I wipe it off. Is it enough to format the drive?

No, there are plenty of utes that can unformat it.

Or should I fill up the drive with non-personal data
to make sure that my personal data got overwritten?

Its better to do a security wipe.
http://dban.sourceforge.net/
http://www.killdisk.com/downloadfree.htm