This by far is the most frustrating feature of the game and if it's just something obvious that I'm missing please help me to look for the visual ques that I am not seeing.

When throwing away/selling/trading with a retainer a piece of equipment I can't tell which are assigned to one of my many equipment sets. Does it say somewhere on the info screen if the item is part of a set or not?

I don't see any icon on the gear to tell if it's in use for some class that I'm not currently equipped as.

I'm sick and tired of the entire set becoming broken if only one item is not in my inventory. I tried to keep as much stuff on me as possible to just avoid the issue but now I just have so much stuff that I need to get rid of the extra weight.

Do I literally need to write down every piece of gear that I'm wearing before clearing inventory space or is there some trick to this that I'm just too dumb to see?

Thanks in advance for the replies.