Files with hdk file extension can be found as disk image backups created in MAXI Disk utility.
HDK file extension - MAXI Disk disk image
What is hdk file? How to open hdk files?
File type specification:
The hdk file extension is mainly related to MAXI Disk backup software from Herne Data Systems that was available for early versions of Microsoft Windows and used to backup installation disks.
Probably old and obsolete by now.
This hdk file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
