This is a good open source Windows program for securely erasing files.
http://eraser.heidi.ieNote: No secure/wipe/erase program will work on SSDs (Solid State Drives).
If you need certain erasure from a SSD, use a drill press. Bonus points if you can convince the company to issue a RMA number for a drilled flash drive.
Bitcoin can't be running when you back up your wallet.
My wallet ultimately goes offline in an encrypted rar with recovery record and 17 char passphrase that is a pattern on the keyboard.
and no it isn't the the code for Contra
The latest version has a command that backs up the wallet without stopping the client.