HN user
I'm running around 838 accounts because why not? I have a unique password for each login since five years ago. I went from LastPass to 1Password and finally settled on self-hosted Bitwarden(Vaultwarden) a year ago.
Logins data on LastPass can be exported to 1Password, just not straightforward. I did that, not going back to LastPass anymore.
You can. Create multiple service accounts, add them to the Shared drives and connect the service accounts using Rclone, a CLI tool that allows you to perform I/O operations on multiple cloud storage.
Once a service account reached the limit, switch to another.
It's Wasabi S3 https://wasabi.com, and ridiculously cheap for storage.