.1kn is Generic disk image format
Key Features: .1KN File Extension
|Category||Disk image (ISO) binary|
What is an .1KN file?
File extension 1kn appears to be used for some, most likely very old, uncommon or no longer used disk image file format, perhaps related to old floppy disks.
No specific information about this could be found, except that programs like ISOBuster can open it.