Trying to set an attachment to MindNode file but won’t take it. Is it normal? It would be good that it could get various kinds of files.
It should be able to handle any normal type of file. Is the MindNode file actually a folder? If you right click on the MindNode file, does it give the option “Show Package Contents”? If so, it is a folder.
If it is a folder, you could zip it to import. You would right click on the file and choose Compress. Then drag the zipped file in.
We will try to improve this in future, so we can import these folder types.