Read the original allegations, not the summary here. Just to start you off, here's
some the things alleged by google you're missing from that summary:
- He installed custom software to access the files.
- The files were in a data store he had no normal access to.
And here's my best guess as to why Google knows so much:
- Google requires access to their networks using either your Google assigned device, or a pre-approved list of devices of your own (basically chromebooks). I know from past interactions with a friend that works at Google that they often give beta versions of software (Android) and/or hardware (Nexus phones, chromebooks) to employees to test. It's entirely possibly that quite a lot of debugging data is reported on some build. Additionally, that same friend noted that Google has a whole department dedicated to rooting our invalid access like what is alleged here, and since they control the devices available to access their network, there's really no conceivably limit to the amount of activity data they could collect about employee usage.
In short, I see no reason why Google couldn't have as much data as they allege and possibly much more. to me, the fact that they waited until this stage to present it also seems calculated to benefit the most from those trying to defraud them (why not stop the forming of Otto initially, or the buyout?). If that's the case, I don't really have much sympathy for Uber, as they seem to possibly have been integral to the crime, and may have escaped punishment if it hadn't gotten this far.
Edit: Whoops, said Waymo where I meant Otto,