I have a client with about a hundred gmail folders (Labels) with over 2000 emails distributed among them, all in Outlook 2013 running under Windows 7. So, needless to say, folder sync time is exceedingly long.
Now, I've found that if I unsubscribe all folders except Inbox and Gmail's "special folders," I can cut down the sync time significantly.
But here's my confusion: if I add or delete emails to/from any of these now unsubscribed folders, they still sync just fine, i.e., I see the changes immediately if I refresh the gmail web page. And, if I make a change online via gmail.com, I can see that change in Outlook fairly soon thereafter. So I guess my basic question is, what is the difference between subscription and syncing? In other words, why would I ever want to subscribe to a folder at all? Is it just that subscribed folders update almost immediately and without me having to click on them? I know I'm missing something here and am just trying to become less ignorant! Thanks.