If you don't want to self-host and you don't want to trust someone else's service (I don't know anything about this server) you get Bitwarden Send with the $10/year premium plan.
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The reason to use Bitwarden could be that you already trust it with something else, and could have taken time and audit that it is indeed legit, or trust others to complain loudly if they find something wrong with the code. Personally, I’d self-host it (or the open source, lighter on resources Vaultwarden), just as an additional safeguard.
EDIT: I'm on mobile, apparently it's 500 MB on desktop.