Windows might be trying to index the drive.
If you are trying to flash a DMG file to a USB drive and see the error you aren't alone. This usually happens because Windows is aggressively "protecting" the drive or another background process is scanning it the moment you plug it in. Transmac Drive Has Been Locked By Another Program
Move the USB to a rear port (if on a desktop) to ensure a more stable connection. 🛠️ Method 1: Use Diskpart to "Clean" the Drive Windows might be trying to index the drive
Once formatted, try the option again. 🚫 Why is this happening? Move the USB to a rear port (if
Go back to TransMac and try to again. 🔍 Method 2: Disable Anti-Virus and Indexing
Security software often "hooks" into a USB drive the second it's plugged in to scan for malware, creating a lock.
Right-click "This PC" > > Services & Applications > Services . Find Windows Search , right-click it, and hit Stop . 🖥️ Method 3: Use the "Format Disk for Mac" Command