Our agency has been successfully using Dropbox for about 11 years. Over that time, we'd added several clients, resulting in "earned storage space". A couple months ago I suddenly lost all of that extra space and am limited to the original free storage amount. We'd never before had a storage problem as we keep files cleaned up. Yet I went through the account with a fine-toothed comb and removed anything slightly extraneous. There still is not enough space for our needs after the mysterious change occurred. Can someone please help me understand what happened and, more importantly, how to get our earned space back?