Transmac Drive Has Been Locked By Another Program -

This resolves the issue nine times out of ten.

Re-open Transmac and try again.

Why this works: Restarting Explorer releases all file handles to external drives. Transmac Drive Has Been Locked By Another Program

Understanding the cause dictates the cure. Here are the most frequent culprits: This resolves the issue nine times out of ten

Rating: ⭐⭐⭐⭐⭐ This fixes the issue 90% of the time. Because Windows creates hidden partitions on USB drives, TransMac gets confused. Re-open Transmac and try again