Default Savest way to root already unblocked nexus without wiping

Hello guys!

My girlfriend lost her emulated_sd card partion on her nexus galaxy.

Im trieing to recover the data with the help of this thread:

Therefore I need Root, which needs an Unblocked Bootloader.

To Unblock the bootloader without wiping data I did this: and it worked brilliant! Wuhu!

Now, so I dont dail after hours, my question:

Whats now the safest way too root? I dont wont to use any toolkits I am not sure about that they dont wipe data in the attempt to root.
In my understanding its now, with unlocked bootloader, possible to root without wiping data right?

Thank you very much!
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