[Question] Where to best upload and share full resolution, uncompressed battle maps?

I shared one of my battle-maps in some places just now (first time for that, really) and got the request to maybe share the full uncompressed version.

My battle-maps tend to be on the larger side and can easily go beyond 15-20mb at times.

I have two issues, mainly where I could use some pointers and input:

1. I don't want to lose all my rights (not even implicitly due to some vague TOS or EULA shenanigans) where I upload to and I am not willing to use any Google or Microsoft related services (nor any of the other large IT related companies, really - hence why I use the fediverse).
2. I'd like to be sure I'm not just clogging someones server up with huge files like lemmy for example. Feels wrong to upload such huge files to a free service.

Got any advice? Should I use something like a (free) Patreon maybe?

Thanks in advance!