Look into Sendme [0] and AltSendme [1] (which is a GUI around the former), they use Iroh [2] which is an open-source encrypted peer-to-peer relay service to send data so there are no limits whatsoever for sending and receiving files, because there's no central server.
From my earlier comment about a similar thread a couple days ago about which file sharing apps people use [3]:
[0] https://github.com/n0-computer/sendme
[1] https://github.com/tonyantony300/alt-sendme
This kind of services that requires the user to share a seed/code to the recipient always seems kinda awkward to me. The code is not simple/short enough to be verbally communicated; If I can send the code, I usually can just send the file.
The code can be easily communicated as a QR code. But a 100 MB file cannot.
Not necessarily. For example I might have a few gigs of photos to send someone, and I want to send them uncompressed. I could text someone the seed or QR code for them to download the photos, but I can't send those photos (especially uncompressed, even if over RCS or WhatsApp) over text.
Wouldn’t this use your internet data, though? Isn’t the point of these tools to send locally without being limited by internet speeds and without having to use your mobile data?
No, Iroh works over LAN as well.