Just upload to wetransfer and send the link via email. Wetransfer also allows you to have them send the notice to email addresses and then get notification of downloads. It’s a great free service, but the links are only good for like a week. For longer term storage to send or store, mega.nz is my goto site. 50 gb free storage, creates links to copy and send to others via email or post to webpages, bbs.
For small size files, sendspace is also a good option. Longer storage than wetransfer, but not as long as mega, and uploads limited to 300 mb.