I recall there used to be an application to split files, later recombine the parts. I have a 6500 Kb pet, viewtopic.php?t=6036 I thought might be useful to the community. But even that small size exceeds the Forum's limitation.
And what is the maximum file size which can be attached to a post?
p.s. I'm aware of this discussion of split and combine, https://ostechnix.com/split-combine-fil ... ine-linux/ but thought we once had an application with a GUI. Remembering command line arguments is not my strong suit.