i could not get that to work yet. sounds easy but so far not working for me.
tutorial i saw said to install stickmount and then mount your other drives to it. then you can use any root level file manager to access the dives. they suggest es file explorer but there are plenty of others.
but i could not get my drives to mount. for now i have been moving files into and out of remix os using a windows program that will read the linux partition the remix data is in. been using http
/www.ext2fsd.com/ for this. until i can troubleshoot why i can't mount my other drives. would make things a lot easier.
oh and the remix data is held in the data.img file in the remix os folder.