hello guys !!! I want to make a backup of my sd card with armbian and other installed on it . In windows not possible because the ext3-4 format of the card . In ubuntu I can see the armbian file system into the card but not copy because I don't have permission So , I put again the card into my orange pi and I type sudo su and then password . I tyoe also sudo -s but nothing . Pratically some folders are not "visible"  Do you have any suggestion? ciao  Walter