If you suspect you have a drive with "fake" capacity, use these reputable tools to test its actual physical limit:

: Many download links for "SData Tool" on third-party sites are considered untrustworthy and may contain viruses or malware designed to compromise your PC. LEGITIMATE Alternatives for Windows 10

Windows has a built-in feature to safely compress files to save space without fake tools. Right-click a folder or drive. Properties Compress contents to save disk space

The use of SData Tool is highly discouraged . The software utilizes a technical "trick" that does not physically increase storage capacity but rather corrupts the file system table to report false data. Using this tool on Windows 10 poses significant risks of data loss and system instability.