Execute list disk to see all active storage devices connected to your PC.
The primary culprit is almost always the Windows operating system itself or a background application erroneously claiming the drive. Common offenders include (if the drive has a drive letter and has been accidentally clicked), antivirus real-time scanners (which may scan a newly connected HFS drive for threats), disk management services (like diskmgmt.msc running in the background), or automatic Windows Backup and Indexing Services . In some cases, the drive’s own firmware or a previous improper ejection of the drive from a Mac can leave a “dirty” state, causing Windows to lock the drive preemptively. drive has been locked by another program transmac
Press the , type cmd , and press Ctrl + Shift + Enter to open an elevated Command Prompt. Type diskpart and press Enter . Execute list disk to see all active storage
For persistent locks, advanced measures are required. The user can open an and use the mountvol command with the drive’s volume GUID to dismount the volume without a drive letter. Alternatively, the diskpart utility allows the user to select the disk and use the offline disk command, which forcibly resets the lock state. A final nuclear option involves disabling the “Automount” feature in Windows via mountvol /N and rebooting, preventing Windows from automatically claiming newly attached drives before Transmac can access them. In some cases, the drive’s own firmware or
If none of the above solutions work, you may want to try:
Identify your target flash drive number (e.g., Disk 1 or Disk 2).