We use Discord to share files, notes, links, images for the curation posts etc. Pretty much anything we used to do with ICQ and then Skype before Microsoft got their grubby little mitts on it and decided that direct file transfer was too good for its users. Either DM or create your own server. We use the latter, it's quick and easy to set up.

You'll thank me for this. Discord replaces Messenger, Dropbox, Skype, including on your phones. Everything from "Here's the file you need" to "Honey, we're out of flour. Please grab some if you get a minute."

Trust me, I'm a doctor.