You can download and make a flash drive with the update. Plug it in and there is a chance sync will just install it and cancel the download. Never tried it, so there can be risk be warned. Or possibly a master reset will break the download and just don’t connect to WiFi and turn off auto updates. BTW did you try to turn off auto updates and see if this cancels it out?My sync is trying to install an update and has been stuck half way for about 2 weeks and is making the whole UI laggy as hell. Any idea how to cancel the update and restart it? Says installing 4U5T-14G422-CAH_1615428946000.TAR.GZ