I would say that nextcloud offers what you seek...Since nextcloud would live under a domain name (or subdomain name) that you control, hence ideally such a domain name would be memorable to you, i would say the scenario you noted is possible.

Here's the brochure/"marketing-y" link to the nextcloud info around sharing, such as via links: https://nextcloud.com/sharing/

And, here's the more in depth info that goes a little deeper: https://docs.nextcloud.com/server/latest/user_manual/en/file...

Note: Instead of sharing the file via memorable links, if possible, having each user download the nextcloud client and sync the file that way is more ideal/better/faster...of course, that approach may not align with your use-case. I hope the above helps! Good luck!