Localsend has never failed me. You can find it on F-Droid for android and their website for installation options for desktop.
Android
DROID DOES
Welcome to the droidymcdroidface-iest, Lemmyest (Lemmiest), test, bestest, phoniest, pluckiest, snarkiest, and spiciest Android community on Lemmy (Do not respond)! Here you can participate in amazing discussions and events relating to all things Android.
The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:
Rules
1. All posts must be relevant to Android devices/operating system.
2. Posts cannot be illegal or NSFW material.
3. No spam, self promotion, or upvote farming. Sources engaging in these behavior will be added to the Blacklist.
4. Non-whitelisted bots will be banned.
5. Engage respectfully: Harassment, flamebaiting, bad faith engagement, or agenda posting will result in your posts being removed. Excessive violations will result in temporary or permanent ban, depending on severity.
6. Memes are not allowed to be posts, but are allowed in the comments.
7. Posts from clickbait sources are heavily discouraged. Please de-clickbait titles if it needs to be submitted.
8. Submission statements of any length composed of your own thoughts inside the post text field are mandatory for any microblog posts, and are optional but recommended for article/image/video posts.
Community Resources:
We are Android girls*,
In our Lemmy.world.
The back is plastic,
It's fantastic.
*Well, not just girls: people of all gender identities are welcomed here.
Our Partner Communities:
The description says it is over the local WiFi though, so not what I'm looking for
Doesn't this require the devices to be connected to the same wifi?
Edit: OP already replied so nvm
The Quick Share option missing is weird - Nearby Share/Quick Share is supposed to be available on every Android 6 or newer device since roughly 2020. And it's supposed to be able to automatically figure out a reasonable way to connect the devices (LAN if they are in the same network, Bluetooth or WiFi Direct otherwise).
You are right that it is workable, I will edit my post
I just use syncthing but not sure outside of home wifi.
+1 for Syncthing
Yeah love it. I use it to share files between Linux, Android, Windows, Steam Deck, and MacOS. Best OS agnostic sync tool I've used.
KDE connect
I tried this between the Samsung and my Debian laptop and none ever recognised the other. Also quite sure it relies on a local network?
Not sure if it helps but i fixed this problem by connecting both devices using a cable. Works like a charm now, even over network
I use Superbeam. You can send to desktop too
Warpinator works quite well for me