Having subscribed to a scenario, I launch Arma and attempt to load the scenario as usual. I then get an error message saying "Operation canceled - not enough disk space"
Note that this does not happen with all scenarios. The below work without problems:
http://steamcommunity.com/sharedfiles/filedetails/?id=200956902
http://steamcommunity.com/sharedfiles/filedetails/?id=189886459
http://steamcommunity.com/sharedfiles/filedetails/?id=174833782
This is similar to 0017609 but My Documents is NOT mapped to a network drive.
I only one HDD in my PC and it has over 1TB free.