Google Maps failed to save offline maps on Lollipop I'm using Nexus 5 32GB, Android 5.0.1. I'm trying to save maps offline, but it's showing me an error whenever I try to save.

It seems the issue is on external storage; it's not writable. The issue started when I used TWRP Updater from Google Play Store, and it added an SD card write patch. How to fix this?

Below is screenshot of error
It was sdcard permission issue. 

I had to flash 5.0 and then 5.0.1 again from fastboot. everything works fine now.