Wiped OS

Hello all
I have a rooted 16gb OPX. It said that I had the storage full, so I checked the storage settings, and the "other" part, the one that is not nor apps nor pictures etc... (i don't know if im making myself clear or not). To solve that, I've restored it to factory, but after reseting it I still had 8.5 gb of space taken, so I decided to go to twrp and wiping dalvik / art cache, system, data, internal storage and cache. And right now my OPX is stuck at OP logo. That made me think, and I may have erased the OS?
By the way, sorry for my english, not a native speaker
Thank you :)

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