Android> G mail, lower right corner is a + to compose a new E mail , next hit the "paper clip" at top, you get >>choices
Attach File
Insert from Drive
Send money>> I will supply my PP account
Request money
Most of the time I'm sending a file i usually eMail it to myself ( open there) or transfer from phone (drag and drop) to the computer find it, open it there and send from my mail program which is Mailbird, which is very good as in "easy".
This help?