Which file to send
Send a GEDZIP file to anyone who uses uFTi, and a plain family tree file only to an older program.
To share your tree with someone who uses uFTi, save a copy as a GEDZIP file with Save as…, and send that file. Keep it safe shows how to make one.
A GEDZIP file holds your whole workspace: the tree, its research notes, and the pictures and other attached files. It is one file, so you can send it from your phone. Nothing is left behind, so the other person sees what you see. Your workspace and its files says more.
For an older program
Some older programs cannot read a GEDZIP file. For them, save a plain family tree file instead. It holds the people, families, facts, sources and research notes, but not the pictures or other attached files. If the other person needs the pictures, send them as well.
Do not send the file you chose
Do not send the file you chose when you opened your tree. uFTi did not change it, so it does not show your new work. The copy that uFTi works on is not a file you can send.
A saved copy stays as it was when you made it. Make a new one before you send, if you have added anything since.