Files with mtbk file extension may exist. However, at the moment, we do not have any information regarding their origin or purpose.
MTBK file extension - Unknown file extension
What is mtbk file? How to open mtbk files?
File type specification:
The mtbk file extension seems to be in use for certain files that are mentioned on the internet. However, we have not yet found their original program nor any specific information about it.
If you know some more useful informations about the mtbk file extension, please let us know in the discussion below or on our forums.