Linux

Either Localsend, if you're only interested in that one function, or KDE Connect for the ultimate experience.

Kdeconnect + dolphin lets you mount your phone

Single file? KDE Connect. A folder? Syncthing

I use syncthing all over the place for this sort of thing. I have some sync directories that are multi way synced across multiple devices, others that are one-way drop targets to a specific device, others that are for operations like backing up photos. It's quite excellent with a good sync algorithm that rarely results in conflicts.

Check out LocalSend. App that let you send things over local WiFi. No server required.

Localsend

LocalSend or KDE Connect. Syncthing if you need to sync files (Like an important documents folder that always needs to be up to date between your PC and Phone)

KDEconnect or gsconnect if you're on KDE or Gnome respectively.

LocalSend has been great for me. It also works over NetBird or Tailscale. The same goes for KDE Connect.

KDE Connect has been mentioned before. You can supplement this and other tools by using a VPN so that both endpoints can see each other even if the underlying network does not allow this. My preferred solutions are Tailscale (managed, cloud-based) or Headscale (for self-hosting).

Onionshare or syncthing

In Debian KDE KDEConnect works well. Dont know about suse but can imagine it works there too

EDIT: grammar

Warpinator. I use it all the time, set a password, make sure you're connected to Wi-Fi and you are all set.

I just use Nextcloud as a storage provider on a local computer.

I use a mix of GSConnect/KDEConnect, Warpinator, and Syncthing. I've got a shared "dropoff" folder on Syncthing that lets me easily drop files from one device to another. You're having issues with Warpinator but if you're able to figure out the issue there, that's my second go-to for one-time file transfers. KDEConnect is a bit more fiddly, but I use it mostly for sharing clipboard info and the occasional file when it's stable enough.

Install an FTP server on your phone. Connect to it via an FTP client on your PC. EZPZ.

Use Localsend!

If you are on same network you can use

python3 -m http.server

It will launch a http server which will serve all the files in your computer.

I used KDEConnect in the past but ran into issues where somehow media sent to my phone wasn't saved somehow. Probably some permission issue but I didn't manage to fix it. Also the windows client only allows selection of one file at a time.

Recently I've tried out LocalSend and found it a much smoother experience.

SSH along with the extra stuff it comes with like scp is the way forward.

The two following suggestions make use of secure shell.

Termux and then pkg install mc (MC is Midnight Commander)

Alternatively, if you are feeling brave and GUI, Total Commander here.

If by wirelessly you mean via Wi-Fi network then one convenient option is qrcp. It generates a QR-code right in your terminal, which you can scan with a phone and send/receive files through a web interface on the URL it provides.

If you want to transfer files regularly, there is another option. Almost every distro has Python installed, and the Python has a "built-in" FTP server. You need to just cd into desired directory and run the command python -m pyftpdlib -w. It will open a FTP server with root in this directory. You then can access it through a file manager, like Material Files for example, and send files and folders back and forth. In Material Files you can save the server address for future use.

Alternatively, Material Files (available in F-Droid) can easily create a local FTP server or connect to a NAS. It's also a pretty good file manager app.

See localsend on github

If you want just a replacement for Warpinator, LocalSend is definitely the way to go. I used Warpinator before, and LocalSend is just an overall better version of the same thing imo. Finds other devices instantly, can also send text in addition to files and folders, and is available across platforms.

Primitive ftpd from fdroid is my go-to "too lazy to configure a cloud thing" solution. It is fast and just works.

uhm, well you can't primarily because android is a hot mess (quick note: this is mostly me ranting about the hell that android is for no fucking reason)

First of all, android only supports MDNS since android 12 and newer, MANY years after the standard was even finalized and put into use. (like a concerning amount) And yes, you can technically use that networking on a per app level (since android 6 or 8 i think), if it's implemented, but most apps don't because they're android apps. And the ones that do are basically useless (very cool thanks android)

Ignoring this, let's say that you have a samba server, and have a local DNS config setup to get around the MDNS bullshit. Oops, funny story, android doesn't natively support SMB shares, because apparently they aren't real and don't fucking exist. Now to be clear, most file managers do actually support SMB, the problem here is that those are often shit, and only supported in the actual file manager itself. If you wanted to per se, mount a samba share on android on the FS level, it is either impossible, or REQUIRES ROOT ACCESS.

Man it's a good thing rooting is easy, and not super convoluted, or risks bricking your phone in the event that it's designed like utter shit and cannot recover from being flashed incorrectly. (to be clear, i don't know shit about rooting, because it's a fucking disaster, and i might be misrepresenting it here, but only rooting, everything else is accurate)

so basically, cool story, the only option here that you have is using apps that are specifically designed to implement their own file transfer functionalities and protocols. There is one redeeming factor to this, and it's the fact that rsync exists, and that it isn't shit, but rsync isn't samba, so eat shit android. Rest in piss you disaster of an OS.

Take a picture of your screen.

/s

I'll throw out another way: to access files from your phone, you can use termux. python -m http.server

Croc or syncthing depending on what kind of experience you are after. Syncthing if you want to have a shared folder like expert. And croc if you just need to send something. Croc has an app on f-droid, and syncthing is on the app store. Both are open source and pretty for excellent in their own right.

Server or desktop, and what types of files? I find that a self-hosted version of NextCloud does pretty well for keeping contacts, images, and videos in sync.

(You could run it on a Pi as an intermediary to both if desired)

I used to use stuff like AndFTP in the past for similar functions

Personally, I prefer LocalSend to KDEConnect.

If it's anything big I send it to my synology nas. If it's something small then I honestly just send it through Signal. Although, I do wanna try this kde connect thing out as well.

samba. share a folder on pc, and on your phone use a file manager that can access smb folders in your local network, then just copy or move from or to that folder. bit of a hassle to set up the first time, but makes things more convenient in the long run.

snapdrop.net

For secure private transfer use the Warp flatpak in Linux and Worrmhole William in Android.

Simply install flatpak then install warpinator

There might be more modern ways of doing this, but I run "Wifi FTP server" on my phone, with my download directory as its root. Then I use filezilla or whatever to transfer what I need. Trouble free and platform agnostic.