I often use AD6, which is also version 6.9, but when you ask, there is no file to read, so I can't answer you basically! The file size is related to many things, such as the size of the board and the number of devices. It also has something to do with the route. For example, drawing a line with 100mil is different from using 10 or 10mil.

Also, if bmp is added, the transferred icon will also have a great capacity.