"This file came from another computer and might be blocked t

[dannyrez420]

I ran into an issue the other day with this Windows security feature where it sets the flag ,

"This file came from another computer and might be blocked to help protect this computer."

We were working on an Assembly Language project in CodeWarrior IDE, where the only affected file was a main.asm file located in a 'Sources' subfolder.
When trying to copy the directory to a laser\dropfolders directory on my school's network, it gave us a write error because the flag was set on the main.asm file.

The problem is, that we did not pass our main.asm file through the internet at all. What else could be causing this?

Additional information: The project was stored on a USB Flash drive formatted as NTFS.


I ran the local group policy editor and went to the area where this option can be disabled, and it reads:

"This policy setting allows you to manage whether Windows marks file attachments with information about their zone of origin (i.e. restricted, Internet, intranet, local). This requires NTFS in order to function correctly, and will fail without notice on FAT32. By not preserving the zone information Windows cannot make proper risk assessments.
"


Can anyone explain this please!




NOTE: I know how to fix the issue, but what I really want to know is the root of the cause....