No one else is reporting this, no.
Not sure I understand, if you deleted all the nwsync files then you would have to have redownloaded all of the files again and so it wouldn't say 0MB any more. So when you do that, when do you crash?
Also consider that anti virus programs have been known to not work with nwsync, if you have one you may need to disable it or disable the web feature (or something akin to that).