Can I delete the .txt files?

[AC Question]

I have a Samsung Galaxy S6. When I first got the phone, I noticed that stored in the Documents were several (about 5) .txt files with a string of 5 different numbers as the titles. I just looked at my Documents again, and I noticed there are now about 50 of these files. Opening the files, I see that they seem to be some type of report. They all mention "VmailDebugService" somewhere. Are these okay too delete?

 

[theviralbytes]

txt files are Text files.
No idea what is creating them.

Right-click on one and Open With TextEdit. Whatever is in the text might give a clue as to what created it.