We have just copied a big chunk of files off a broken home NAS by mounting the hdd in a windows PC. Luckily this one has a windows format partition on it, the other one doesn't so I'll need to make a bootable Linux USB dongle, probably via https://www.pendrivelinux.com/ and boot from that.
However back to windows, and I can't read any of the files on Win10 because the permissions don't map onto the users and groups in Win10, and UAC doesn't help because it won't allow me to "be" an administrator.
But I found the answer! :-D
Run powershell "as administrator" cd to the broken directory and use this command to recursively reset the permissions to the system default set for a whole tree.:
Run powershell "as administrator" cd to the broken directory and use this command to recursively reset the permissions to the system default set for a whole tree.:
icacls .\ /reset /T /C /L
If that doesn't work you can take ownership of the tree using this command and then try the icacls (eye cackles?) command again
takeown.exe /F .\ /R
