Dev 3 preview problems

[kclive]

I just clean flashed the new N Developer preview (version 3) on my 6P and that went well, I then fashed the twrp 2.8.7.0 so I could install SU and have root, but after installing the twrp it shows that I have 0 MB left on my internal storage and can't locate the SU zip that I copied to my interal storage.

I might have missed something, but does anyone have any ideas?

Thanks

 

[kclive]

Think I got it taken care of with fastboot format userdata