in gmail, i can seperate the sent from the inbox messages. However, on my samsung galaxy s5 on the gmail app, i can't seperate the sent messages from the inbox messages. I ONLY want to see the inbox messages. How do i do that?
That's one reason I uninstalled the GMail app - too many versions doing too many things differently than what I want. I use Email. You can see every account, and every folder in an account, separately.
(This is assuming that you're connecting the S5 to an IMAP email account. There are no real "folders" in a POP3 account, the email app just simulates them, and that could be flaky in the GMail app.)