A systems administrator needs to ensure data cannot be recovered from old media. Which of the following is the MOST effective method for the administrator to use?

Zeroizing all sectors performs a low-level overwrite of every addressable sector with zeros (or a pattern), eliminating any remnant magnetic or electronic traces of original data. Unlike logical deletion methods, this physically destroys the data content itself. It is the most effective software-based sanitization method recognized by standards such as NIST SP 800-88.

Formatting only rebuilds the file system metadata and allocation tables; the underlying data blocks remain intact and are easily recoverable with forensic tools.

Emptying the recycle bin removes the OS-level pointer to the file but leaves all data sectors untouched and fully recoverable.

Changing the media format (e.g., FAT32 to NTFS) is a logical operation that restructures the file system without overwriting the raw data sectors.