XBL Gold Trial codes - Will there be issues?

In a previous thread, I was told that while on a 14-day XBL Gold trial, players are unable to upload anything to their file share, which made me slightly concerned. Are the free trials being treated differently from other XBL subscribers? Why is it disallowing the use of the file share? Are there any other things that this affects? I played before the 20th, but on a trial code due to the fact that I had just bought the game and only needed XBL for the sole purpose of playing online. Will this void my eligibility in unlocking the other specializations early?