I don't know whose "USB Installer" you reference, but Manjaro has little influence on things outside of Manjaro. If you mean Rufus, then it is up to you, the Windows user, to explore how it works with Manjaro, and that requires a little--just a little--research on the part of the intended user.
As you are learning, not all breeds of Linux are alike. You'd have had difficulties with the various RPM-based distributions, as well. That's why, for example, they usually have things available like the excellent aforementioned Manjaro Wiki.
As well, there is the also stated forum FAQ and the forum Search tool. We're a very active community, so it is important that you help us to help you.
There is a wealth of other resources, as well. The longer you're here the better able you'll make use of them, please and--now that you've gotten your start--please do so. I would also be remiss if I did not post the link to the Arch Linux Wiki. Manjaro, though its own distribution, is based in Arch Linux (similar to how Mint is based in Debian), and the Arch Wiki is renowned for its documentation.
Welcome to Manjaro Linux!