icloud, onedrive, and google drive are all garbage.
icloud will randomly decide to continuously download the same folder over and over again eating 70-80gb of bandwidth a day.
Google drive, cant even sync shared folders unless you press a bunch of secret keyboard shortcuts on the web version to add it to the drive.
Onedrive randomly decides to chew 100% cpu until the process is quit. It's also sluggish as hell.
Dropbox is the only one that does most things well, supports delta sync (so an entire gb file isnt downloaded in full for a small change) but lately, even this app is getting bloated.