Hello,
First of all, great tool, already setup and running!
I have the same limitations reported here:
https://www.reddit.com/r/selfhosted/s/pCAJCWPlvk
Most of my files are > 10gigs, and even if it works on PC (will download to the ram first, and then trigger the browser 's download), it won't finish on mobile phone due to the ram limitations.
At least this is what I observed and seems consistent with the reddit post.
Thanks!