Hi,
I've been using updraft for a couple of months now and it worked fine until today. I set it up to backup everything to Amazon S3 once per day. Our host has an approximately 2Gb daily write limit; this was exceeded, presumably by the plugin since no one else was working on the site. I'm not sure why the plugin was writing anything, since all it needs to do is read the files on the server and write them to S3.
Nonetheless, once we hit the limit, the server began rejecting the write requests, which caused the plugin to keep trying... a lot. The the point that it brought down the host, and they were forced to kill our site. This sounds like a bug that would be worth looking into; if the server is rejecting the requests, there should probably be a limit to how many times the plugin keeps trying.
Thanks.