Moving logic pro x entire library to an existing LPX on another mac

Hi, i live in Lebanon and we have very slow internet connection

So i use hotspot in order to use internet and download content

i downloaded Logic pro x on my iMac & macbook pro, but because i use mobile 3G hotspot i only downloaded some of the LPX content every month

My friend was traveling to the California and she has a macbook pro, so i opened a personal account (administrator) on her mbp and downloaded LPX on it.

I told her to download the entire LPX content on her laptop when she arrives to cali so when she comes back, i can take the entire LPX library and install it on my mac's

I did some research and saw that users are moving their entire LPX library to an dedicated external drive making their macs run smoother

My question is how do i take the new downloaded LPX content, and add it to my existing LPX on my iMac & mbp with out messing the whole thing up?

Any help would be appreciated

Thank you..