Before jumping into fixes, it’s crucial to understand the mechanics. Windows uses a file locking mechanism to prevent data corruption. If Program A is reading or writing to a drive, Windows tells Program B (Transmac) that the drive is "busy" or "locked."
However, Transmac requires raw disk access. It needs to talk directly to the volume’s sectors. If any other process—even a seemingly harmless one like File Explorer or an antivirus scanner—is holding a handle to the drive, Transmac sees this as a lock.
The error message is Transmac’s polite way of saying: "I cannot get exclusive rights to this drive. Another program is interfering." Transmac Drive Has Been Locked By Another Program
Understanding the cause dictates the cure. Here are the most frequent culprits:
Even if the drive is physically connected, Windows may still think it is in a "removal pending" state. Before jumping into fixes, it’s crucial to understand
Transmac provides an "Ignore" button when the lock error appears. According to Transmac documentation, pressing "Ignore" forces the software to attempt the operation despite the lock.
You should only use this if:
Never use Ignore if Windows is currently copying files to the drive or if an antivirus scan is running. Doing so can result in total data loss or a corrupted partition table.