Google drive is free and gives lots of space. drive.google.com just don't let it install anything on your local PC. I still use the older version. The new one is too intrusive.
Seems like too much work to me. Easy2Boot is much easier to configure, just copy the iso's to the correct directory and you're done. The interface can be customized as well, although I have to admit that getting my own background image was a royal PITA, that's for sure. And I ended up with a 64GB usb stick that had Version 5 and 6 of Macrium Reflect Acronis 2013-2016 and although you can't see it on the main menu, a Windows 7 Ultimate 64bit, ei.cfg removed iso. Along with 3GB of setup files that I placed in a directory in the root that Easy2Boot thankfully just ignored. How's this look?