Today, we’re increasing file storage limits on the free plan.
Instead of sharing 1 GB between files and email, you’ll now have:
5 GB for Proton Drive
1 GB for Proton Mail
Additional context: For Proton Drive, you now start with 2 GB and for Proton Mail, you start with 500 MB. After signing up for the Free plan, you can unlock the maximum storage allowance on each service thus:
You can boost your Proton Mail storage from 500 MB to 1 GB by completing four account setup actions.
You can boost your Proton Drive storage from the default 2 GB to 5 GB by completing three tasks.
Didn't even notice that one... I'm not sure if that's a feature I want. I don't want them knowing my Google identity, and I definitely don't want Google knowing my Proton email identity either.
I have a junk gmail box that I use with no real info on it, I linked it then immediately unlinked it, and that seems to have worked. So I guess if you wanted to do this portion but not give them access you could make a Gmail you will never use just to link then unlink.
According to their docs, it links as an "app" so you give proton access to your Gmail. It doesn't share your proton email with gmail and all Google would be tracking is proton requested to read emails as they come in.