Long story short, I ned to securely wipe a flash drive. How can I do that. Please don't suggest throwing away, or smashing it, and the fact that flash drives are so inexpensive nowadays. This is a 512GB flash drive and I paid about $150.00 for it so smashing or throwing away is not an option, I need to wipe it so NOTHING can be recovered. I am selling it to a tech savvy friend who I just know is going to want to see what I've had on it. I've tried using Heidi Erasure but it seems to always come up with errors when trying to wipe and overwrite files on flash drives and SSD's.