I'm getting the same error.

Googling the error, it seems like you can only rename files in Dart if they are on the same filesystem. The workaround is to use File.copy instead. You are renaming files using File.rename in moving.dart#135, but the previous line calls File.copy -- the ternary syntax there makes it hard to understand the logic: any way you could detect if the destination is on a different filesystem and call a different function accordingly?

I was not using the tool in the way you intended, but let me walk through my thinking: I assumed that you were copying full files around. I figured that you would leave the pictures in Google Takeout directory and copy the into a new directory. I didn't want to thrash my disk doing that (nor do I have that much free space), so I decided to use different drives for source and target -- I figured one disk would read while the other writes. One additional reason why I wanted to do that was to have a very clear source & destination in case anything went wrong -- I think I would prefer to leave the Google Takeout directory in-place in case I don't like the results of the TakeoutHelper.

Now that I understand that you're not moving the full content of the file, just "renaming" them, I realize that copying "in place" won't thrash the disk. I don't mind proceeding with that workaround, but If something breaks halfway, I'm a bit worried that I will have to start all over, downloading ~250GB of TAR files from Google and extracting them.

Can't output files to different drive than input #251

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