These tools modify the drive's firmware to report a higher capacity (e.g., making a 4GB drive appear as 8GB). When you try to save more data than the physical hardware can hold, it begins overwriting your older files, leading to permanent data corruption and loss.
"Cracked" versions of such tools, often distributed on questionable forums or file-sharing sites, are frequently infected with malware, keyloggers, or ransomware designed to compromise your computer. How to Verify Your Drive These tools modify the drive's firmware to report
If you suspect you have a drive that has been tampered with or "expanded" using such tools, you should test it with legitimate diagnostic software: How to Verify Your Drive If you suspect
The gold standard for detecting fake capacity drives. It writes data to the entire drive and then reads it back to verify the physical storage exists. it begins overwriting your older files