Yesterday (May 23) afternoon, I noticed a folder named com.apple.app-analytics.production.upload-dropbox in my Documents. It contained dozens of subfolders, apparently with no content. It synced across all my devices (Mac and iOS) via iCloud. I deleted it, but it returns after a few hours and has done this several times. I do NOT use Dropbox and don't have it installed on any of my devices. Any ideas what it is and/or how to permanently get rid of it? Thank you.