If you’ve tried every step and the error persists, the drive’s partition table may be corrupted. In that case, use data recovery software first, then reformat using TransMac’s “Format Disk for Mac” function after booting into Safe Mode with no other drives connected.

: Real-time scanning utilities continuously inspect removable media when partition tables change, preventing external writes.

: Right-click the TransMac shortcut and select Run as administrator . Without elevated privileges, the program may not be able to override existing system locks on the disk.