[perspicacia]

@Zpower Thank you for the confirmation that skin.helper.skinbackup it works on PCs. You get the same android python zipfile error as the others and this is with the encoding attempt from my version of the script. The error message itself is not particularly verbose though. Quick google led me to a bug report of xbmcbackup which appears to have had a similar issue and there's a custom and patched zipfile.py specifically for Android https://github.com/robweber/xbmcbackup/issues/158
I've added the patched zipfile.py and added a condition for Android and hope that won't break anything else. Please test.

It works!! Thank you