A few things that are well-covered in this thread, but my personal favorite is PicoShare. It is a nice, simple self-hosted file sharing app that fixes a lot of issues with other solutions.

Email has size limitations. Many services don't like to share .exe files. Some will apply compression (unlisted youtube videos). I like this because it's a simple app that allows you to share files with others, and give them a link to share files to you.

https://github.com/mtlynch/picoshare

http://pico.rocks/