I have recently upgrade my Zuk 1 to cm 13 nightly but after flashing recovery...I forgot to erase cache,system,and delvik cache and install the zip files included cm 13 and gapps but in-between I got an error then I go back and try to come in stock ROM that cyanogen OS 12.1but I stuck at boot loop... I think I bricked my Zuk 1(felling :crying
Then I go into custom recovery (twrp) and connect my Zuk 1 to laptop and copy files to Zuk 1 but when I disconnect my Zuk 1 and try to install zip files , there are no files present in install zip section of custom recovery , then again I copy that zip files and again same ,no files are present there and then I came to know that when I am connected with my laptop and pasting files, I see all files (zip) in my custom recovery still connected with laptop then I tap on that files and one by one I install it using custom recovery still connected with laptop.... I think if I disconnect I will lost my all files and then I flash all zip files till reboot and I got my new ROM
I think I will face some problem with this ROM in future or I will get a bricked carrier !!
Credit goes to : ankurpandeyvns