I did notice, from reading the info on V6 supercharger, that you need to have busybox 1.82 or lower. Nothing above 1.82 will work, or so what the information said. That's all I know for that.
As for nandroid backups, do you have the backup located in a folder somewhere? What is the file format of it? I usually change file formats to zip so it can be extracted and viewable. Big files like that, I normally hook up my phone to the laptop, copy the file, place it in a folder or desktop on my laptop, change file format to zip and use 7zip or WinRAR to extract and/or view all the folder and files in it. I haven't messed with nor created nandroid backups for a long long time. I did one nandroid backup sometime this past February and haven't used it ever since.
Hope some of this info helps.
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