caos

Yes, sorry, I had overlooked that. That’s why I recommended Lufi afterwards.

Oh, over the Internet, not just the local network … then maybe Lufi?

for example this instance: https://upload.disroot.org/

Works well, but not particularly fast with large amounts of data (up to 2GB possible)

KDE-Connect? https://kdeconnect.kde.org/

It works very well for the data exchange between Linux, Android, iOS and Microsoft devices. https://apps.kde.org/kdeconnect/

Of course, it can do a lot more, it’s a bit oversized for just data exchange

There is also Fediverse software that has integrated ListenBrainz: Sharkey (Misskey-Fork) has the feature “Federated Backgrounds and Music status - You can add a background to your profile as well as a music status via ListenBrainz, show everyone what music you are currently listening too” https://activitypub.software/TransFem-org/Sharkey/-/blob/develop/README.md?ref_type=heads

Here you can find (at least for Android) app lists for Fediverse apps (take also a look at the subcategories): https://android.izzysoft.de/applists/category/named/fediverse?lang=en

My answers from Firefish unfortunately do not arrive here on Lemmy. It would be great if it basically worked from Firefish, now. If it is instance-dependent, I would perhaps change the instance, because Firefish offers many advantages compared to Mastodon.