this post was submitted on 31 Oct 2025
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Many files copied to an external disk are cached, and not written immediately unless you run the "sync" command.
So when you press the "eject" icon, on most frontends a notification will tell you not to unplug it right away, once the write is complete it will send a "it is safe to remove the drive" message. This can take a couple minutes if you are writing a big file to a slow drive.
Thats bad practice though, external drives in Linux should be mounted with no write caching just like they are in windows.
By default Windows disables file caching on external USB drives. It should be writing those files directly. That doesn't prevent a program from locking a file or folder that it is using though.