Hi, I need root access for the android version. Any idea on how to do this?

Or any way to be able to write in external drives. I was trying with an NTFS disk, and a FAT32 usb, and the last one I formatted from the android, and I´m not able to for example, set on torrent applications the destination to this drives, they show me that can´t write on the disk.

thanks in advance.