Ensure no windows are open to "This PC" or any specific drive folder.
Before trying complex fixes, ensure you are giving TransMac the power it needs. Right-click the TransMac icon and select Run as Administrator . This is often enough to bypass simple OS-level locks. 2. Disable Security Software Temporarily Many users report that Windows Defender is the primary culprit. Windows Security Virus & threat protection settings Real-time protection temporarily while you use TransMac. 3. Use Diskpart to "Clean" the Drive Transmac Drive Has Been Locked By Another Program
Are you using this TransMac drive to , like Sonoma or Monterey? Ensure no windows are open to "This PC"
Temporarily disable in Windows Security. This is often enough to bypass simple OS-level locks
The simplest solution involves forcing the drive into an uninitialized state.
The "Drive has been locked by another program" error in TransMac typically occurs when a Windows process—such as File Explorer, an antivirus, or disk management service—is actively accessing or monitoring the USB drive, preventing TransMac from gaining the exclusive control needed to format or write to it .