My computer, or theirs. My phone, my data. Back up my data to their computer, their control. This is perfect plausible deniability for them. "Hey, we gave t

My computer, or theirs. My phone, my data. Back up my data to their computer, their control. This is perfect plausible deniability for them. "Hey, we gave them a secure device. But they chose to upload their data to us, and we made it clear how we handle it in our terms of service." Which it is.