I first used file explorer then did it from disk manager then again in command prompt. How would you suggest totally wiping an ssd in the future?
BitDefender saying it "scanned 4 files" doesn't necessarily mean 4 actual files.
Could be just the file structure.
How to wipe and SD depends on what will be the follow on use.
If for me continuing to own, delete all partitions in Disk Management and reformat.
If for an OS reinstall, delete all partitions during the OS install process.
If to sell, secure erase, via whatever means the manufacturer presents you.