[Q] Unrooted with SuperSU & lost all data

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http://forum.xda-developers.com – My phone's been rooted ever since i got it and the only reason i was looking into unrooting it is because work email app won't install on a rooted device. i didn't want to return to stock and lock my bootloaders and all that as i really like the rom i'm using, which is Trickdroid 8.1. a lot of searching on the internet and several discussions pointed to using the unroot feature in supersu but i was under the impression that data on the phone would not be lost/deleted. boy was i wrong. i went ahead to unroot in supersu and it took sometime to remove itself along with superuser app. unroo (HowTos)