Secure erasing is the best way to sanitize an SSD while allowing reuse. SSDs use flash memory, wear leveling, and overprovisioned storage areas, so traditional overwriting or file wiping may not reliably reach every storage block. Secure erase commands are designed to instruct the SSD controller to sanitize stored data across the drive. Degaussing is effective for magnetic media, but SSDs do not store data magnetically, so degaussing is not appropriate. Formatting only removes filesystem structures and may leave recoverable data. File wiping may miss hidden or remapped blocks. Encrypting protects data going forward, but simply encrypting an already used drive does not necessarily sanitize existing sensitive data. Secure erasing best meets both sanitization and reuse requirements.

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