A user tells you they need to access a file on a shared drive, but they are unable to. How would you resolve this?

"When presented with this type of issue, the first thing I check is whether the system that is sharing the drive is turned on. If it is, I then check the other files that the user has permission to access to see if the issue is global or specific to the single file. I then verify the user's permissions to ensure they have the right to access that particular file. If all of this checks out, I start checking their file-sharing programs to see if they are working and can copy that file to their local drive. Finally, I make sure that the file is not currently being used by someone else or unavailable for another reason. One of these steps usually resolves the issue."