Keith Nuttle wrote:
I have recently had a Windows XP computer that I replaced with a Windows
8.1 computer. I scrubbed the disk with a disk eraser.

Question: If I were to scrub a thumb drive or flash card, does it need
the multipass cleaning that a hard drive would require?

Thumb drive/flashcard stores in is chip memory, "and/or" gates. It
seems like once the gate was change there would be no residual
properties to remove.

A hard drive stores by changing the surface properties of the disk.
Planning on discarding the thumb drive/memory card ?
- if so format it and destroy it.

If not discarding the thumb/memory card, wipe it and re-use it.


--
....winston
msft mvp consumer apps