Continue moving files when process stopped I was transferring (moving) files from one drive to another. Then the computer was out of battery and it did a shutdown.

Now I see the group of files I wanted to move "50% opacity" in the destination folder. I can do nothing with them. And if I try to move again from the source, it says that the files are in use.

How can I resume the move?

Did I lose any files in the source drive? I ask this because some of them moved, and now they are not in the source folder... but the destination folder is "untouchable".
If the source has the same number of solid files as the destination has translucent, it is safe to manually resume the move. Drag and drop to move from source to destination, and select "replace" when prompted. Translucent files are just empty placeholder files.

My personal practice always involves copying, then deleting once done. To insist on a copy, hold down Option. It's a bit more tedious but it's saved me much frustration over this sort of matter.