by Ken Task.
In 2.6 there was an experimental setting for using gzip (tar.gz) for compression which has become the default now (as opposed to zip/unzip) in higher versions of Moodle 2.7->3.x.
The 'no extension' file name is probably a gzip. In linux, on could find out via:
file -b [nameoffilewithnoextension]
example:
[root@moodle data]# file -b ./hs2crs/backup-moodle2-course-58-wise-20150612-2223-nu.mbz
gzip compressed data, from Unix
The gzip compressed data, from Unix is the response from file -b
In Windows, whatever can look at files like that.
Am not a programmer ... this post might fit better in the General Developer forum.
Hoping the info shared will be enough to put you onto the right track.
'spirit of sharing', Ken
