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So, I have 2 Google Drive accounts. Let's say Drive A and Drive B.

If one day I login/upload to Drive A then log out, then login/upload to Drive B, can they notice that I have 2 different accounts? Or can they only know that I accessed Google Drive without knowing anything more?

And what if I login/upload to both accounts at the very same time? Do they know then?

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  • If you tunnel your connections through a VPN you will be sure to avoid the introspection of an ISP. You should learn how to use Wireshark so that you can see what your ISP 'sees'. This is more a question of privacy than security, so I expect the moderators will tell you that in due course.
    – Ed Daniel
    Commented Apr 13, 2022 at 20:02
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    @EdDaniel Follow-up question: "Can my VPN provider see if I have two Google Drive accounts?'
    – user163495
    Commented Apr 13, 2022 at 20:11
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    OP, are the hostnames of the two Google drives the same?
    – mti2935
    Commented Apr 13, 2022 at 20:14
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    @Marcel A lot of fear from ISPs stems from VPN marketing departments, acting like ISPs will constantly monitor everything you do in real time for some bizarre reason.
    – user163495
    Commented Apr 13, 2022 at 20:47
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    Please don't vandalize your posts.
    – user163495
    Commented Apr 21, 2022 at 12:11

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The fast response is "no", your ISP can not see how many accounts of gdrive you have and which of them you are using. In fact, as far as I know, the majority of the traffic to google services is TLS(probably all), so the only thing that your ISP can see is that you are accessing to google services by analyzing the TLS client hello SNI or by checking your DNS resolutions.

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