.2KN File

File extension 2kn is most likely used for some, most likely very old, uncommon or no longer used disk image file format, perhaps related to old floppy disks.

Unfortunately, no information about this could be found, except that programs like ISOBuster can open it.

How to open:

You can import/open these .2kn files with IsoBuster.

How to convert:

Perhaps can be converted to other similar disk image formats.