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Neither. Sidedrop is a website — open it on both devices, pair them, and drop files. There’s nothing to install and no sign-up, so there’s also nothing about you to store.
There’s no artificial cap. Received files stream to on-disk storage in your browser rather than memory, so large files (multi-gigabyte) work — bounded in practice only by free disk space. The exception is receiving a very large file on a phone, which some mobile browsers limit.
No. Sidedrop works across different networks — your phone on cellular to your laptop on Wi-Fi, or to someone across the world. It uses a direct peer-to-peer connection, with a relay fallback for networks that won’t allow a direct one.
Yes. Share the room link through any messenger; when they open it, the two of you are paired and you can send. The transfer is still direct and encrypted between your two browsers.
It pauses and picks up where it left off once the path is re-established — only the missing pieces are resent, not the whole file. This holds while both tabs stay open. Fully closing or reloading a tab ends that session; Sidedrop isn’t cloud storage, so there’s no “resume later.”
Chrome and Edge on desktop have the smoothest experience, including a native “save as” dialog and folder saving. Firefox and Safari work too, saving via ordinary downloads (a zip for folders and batches). Sending works everywhere, including phones.
Nothing. Sidedrop is free and open source, with no paid tier and no ads. It’s a showcase project and a small thank-you, not a business — an optional GitHub Sponsors link is the only ask.